Home / 27,980.76-38,612.06-15,405.24

Finding the Fourth Proportional to 27,980.76, 38,612.06 and 15,405.24

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Solution

The fourth proportional to 27,980.76, 38,612.06 and 15,405.24 is: 21,258.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,980.76 : 38,612.06 = 15,405.24 : x
  2. Step 2: Convert to fraction form
    27,980.76/38,612.06 = 15,405.24/x
  3. Step 3: Cross multiply
    27,980.76x = 38,612.06 × 15,405.24
  4. Step 4: Simplify right side
    27,980.76x = 594,828,051.19
  5. Step 5: Solve for x
    x = 594,828,051.19/27,980.76
  6. Step 6: Final answer
    x = 21,258.47

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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.