Home / 28,715.19-39,630.51-17,385.12

Finding the Fourth Proportional to 28,715.19, 39,630.51 and 17,385.12

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Solution

The fourth proportional to 28,715.19, 39,630.51 and 17,385.12 is: 23,993.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,715.19 : 39,630.51 = 17,385.12 : x
  2. Step 2: Convert to fraction form
    28,715.19/39,630.51 = 17,385.12/x
  3. Step 3: Cross multiply
    28,715.19x = 39,630.51 × 17,385.12
  4. Step 4: Simplify right side
    28,715.19x = 688,981,172.01
  5. Step 5: Solve for x
    x = 688,981,172.01/28,715.19
  6. Step 6: Final answer
    x = 23,993.61

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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.