Home / 39,478.02-54,479.35-21,572.70

Finding the Fourth Proportional to 39,478.02, 54,479.35 and 21,572.70

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Solution

The fourth proportional to 39,478.02, 54,479.35 and 21,572.70 is: 29,770.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,478.02 : 54,479.35 = 21,572.70 : x
  2. Step 2: Convert to fraction form
    39,478.02/54,479.35 = 21,572.70/x
  3. Step 3: Cross multiply
    39,478.02x = 54,479.35 × 21,572.70
  4. Step 4: Simplify right side
    39,478.02x = 1,175,266,863.88
  5. Step 5: Solve for x
    x = 1,175,266,863.88/39,478.02
  6. Step 6: Final answer
    x = 29,770.16

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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.