Home / 28,713.66-39,631.20-18,117.66

Finding the Fourth Proportional to 28,713.66, 39,631.20 and 18,117.66

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Solution

The fourth proportional to 28,713.66, 39,631.20 and 18,117.66 is: 25,006.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,713.66 : 39,631.20 = 18,117.66 : x
  2. Step 2: Convert to fraction form
    28,713.66/39,631.20 = 18,117.66/x
  3. Step 3: Cross multiply
    28,713.66x = 39,631.20 × 18,117.66
  4. Step 4: Simplify right side
    28,713.66x = 718,024,606.99
  5. Step 5: Solve for x
    x = 718,024,606.99/28,713.66
  6. Step 6: Final answer
    x = 25,006.38

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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.