Home / 15,310.13-21,130.89-9,995.72

Finding the Fourth Proportional to 15,310.13, 21,130.89 and 9,995.72

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Solution

The fourth proportional to 15,310.13, 21,130.89 and 9,995.72 is: 13,795.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,310.13 : 21,130.89 = 9,995.72 : x
  2. Step 2: Convert to fraction form
    15,310.13/21,130.89 = 9,995.72/x
  3. Step 3: Cross multiply
    15,310.13x = 21,130.89 × 9,995.72
  4. Step 4: Simplify right side
    15,310.13x = 211,218,459.79
  5. Step 5: Solve for x
    x = 211,218,459.79/15,310.13
  6. Step 6: Final answer
    x = 13,795.99

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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.