Home / 39,158.79-54,039.15-21,253.77

Finding the Fourth Proportional to 39,158.79, 54,039.15 and 21,253.77

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Solution

The fourth proportional to 39,158.79, 54,039.15 and 21,253.77 is: 29,330.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,158.79 : 54,039.15 = 21,253.77 : x
  2. Step 2: Convert to fraction form
    39,158.79/54,039.15 = 21,253.77/x
  3. Step 3: Cross multiply
    39,158.79x = 54,039.15 × 21,253.77
  4. Step 4: Simplify right side
    39,158.79x = 1,148,535,665.10
  5. Step 5: Solve for x
    x = 1,148,535,665.10/39,158.79
  6. Step 6: Final answer
    x = 29,330.21

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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.