Home / 38,639.76-53,318.43-21,641.64

Finding the Fourth Proportional to 38,639.76, 53,318.43 and 21,641.64

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Solution

The fourth proportional to 38,639.76, 53,318.43 and 21,641.64 is: 29,862.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,639.76 : 53,318.43 = 21,641.64 : x
  2. Step 2: Convert to fraction form
    38,639.76/53,318.43 = 21,641.64/x
  3. Step 3: Cross multiply
    38,639.76x = 53,318.43 × 21,641.64
  4. Step 4: Simplify right side
    38,639.76x = 1,153,898,267.43
  5. Step 5: Solve for x
    x = 1,153,898,267.43/38,639.76
  6. Step 6: Final answer
    x = 29,862.98

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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.