Home / 10,520.29-15,852.85-8,712.10

Finding the Fourth Proportional to 10,520.29, 15,852.85 and 8,712.10

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Solution

The fourth proportional to 10,520.29, 15,852.85 and 8,712.10 is: 13,128.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,520.29 : 15,852.85 = 8,712.10 : x
  2. Step 2: Convert to fraction form
    10,520.29/15,852.85 = 8,712.10/x
  3. Step 3: Cross multiply
    10,520.29x = 15,852.85 × 8,712.10
  4. Step 4: Simplify right side
    10,520.29x = 138,111,614.49
  5. Step 5: Solve for x
    x = 138,111,614.49/10,520.29
  6. Step 6: Final answer
    x = 13,128.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.