Home / 28,088.72-38,761.04-15,513.20

Finding the Fourth Proportional to 28,088.72, 38,761.04 and 15,513.20

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Solution

The fourth proportional to 28,088.72, 38,761.04 and 15,513.20 is: 21,407.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,088.72 : 38,761.04 = 15,513.20 : x
  2. Step 2: Convert to fraction form
    28,088.72/38,761.04 = 15,513.20/x
  3. Step 3: Cross multiply
    28,088.72x = 38,761.04 × 15,513.20
  4. Step 4: Simplify right side
    28,088.72x = 601,307,765.73
  5. Step 5: Solve for x
    x = 601,307,765.73/28,088.72
  6. Step 6: Final answer
    x = 21,407.45

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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.