Home / 28,407.19-39,202.20-15,660.88

Finding the Fourth Proportional to 28,407.19, 39,202.20 and 15,660.88

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Solution

The fourth proportional to 28,407.19, 39,202.20 and 15,660.88 is: 21,612.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,407.19 : 39,202.20 = 15,660.88 : x
  2. Step 2: Convert to fraction form
    28,407.19/39,202.20 = 15,660.88/x
  3. Step 3: Cross multiply
    28,407.19x = 39,202.20 × 15,660.88
  4. Step 4: Simplify right side
    28,407.19x = 613,941,185.40
  5. Step 5: Solve for x
    x = 613,941,185.40/28,407.19
  6. Step 6: Final answer
    x = 21,612.17

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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.