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Finding the Fourth Proportional to 38,655.46, 53,347.08 and 21,658.78

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Solution

The fourth proportional to 38,655.46, 53,347.08 and 21,658.78 is: 29,890.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,655.46 : 53,347.08 = 21,658.78 : x
  2. Step 2: Convert to fraction form
    38,655.46/53,347.08 = 21,658.78/x
  3. Step 3: Cross multiply
    38,655.46x = 53,347.08 × 21,658.78
  4. Step 4: Simplify right side
    38,655.46x = 1,155,432,669.36
  5. Step 5: Solve for x
    x = 1,155,432,669.36/38,655.46
  6. Step 6: Final answer
    x = 29,890.54

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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.