Home / 15,503.91-21,397.20-8,699.81

Finding the Fourth Proportional to 15,503.91, 21,397.20 and 8,699.81

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Solution

The fourth proportional to 15,503.91, 21,397.20 and 8,699.81 is: 12,006.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503.91 : 21,397.20 = 8,699.81 : x
  2. Step 2: Convert to fraction form
    15,503.91/21,397.20 = 8,699.81/x
  3. Step 3: Cross multiply
    15,503.91x = 21,397.20 × 8,699.81
  4. Step 4: Simplify right side
    15,503.91x = 186,151,434.92
  5. Step 5: Solve for x
    x = 186,151,434.92/15,503.91
  6. Step 6: Final answer
    x = 12,006.74

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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.