Home / 21,454.20-29,606.81-13,070.70

Finding the Fourth Proportional to 21,454.20, 29,606.81 and 13,070.70

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Solution

The fourth proportional to 21,454.20, 29,606.81 and 13,070.70 is: 18,037.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,454.20 : 29,606.81 = 13,070.70 : x
  2. Step 2: Convert to fraction form
    21,454.20/29,606.81 = 13,070.70/x
  3. Step 3: Cross multiply
    21,454.20x = 29,606.81 × 13,070.70
  4. Step 4: Simplify right side
    21,454.20x = 386,981,666.11
  5. Step 5: Solve for x
    x = 386,981,666.11/21,454.20
  6. Step 6: Final answer
    x = 18,037.57

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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.