Home / 38,990.48-53,807.40-21,995.51

Finding the Fourth Proportional to 38,990.48, 53,807.40 and 21,995.51

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Solution

The fourth proportional to 38,990.48, 53,807.40 and 21,995.51 is: 30,354.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,990.48 : 53,807.40 = 21,995.51 : x
  2. Step 2: Convert to fraction form
    38,990.48/53,807.40 = 21,995.51/x
  3. Step 3: Cross multiply
    38,990.48x = 53,807.40 × 21,995.51
  4. Step 4: Simplify right side
    38,990.48x = 1,183,520,935.74
  5. Step 5: Solve for x
    x = 1,183,520,935.74/38,990.48
  6. Step 6: Final answer
    x = 30,354.10

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.