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Finding the Fourth Proportional to 38,561.65, 53,214.70 and 21,565.70

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Solution

The fourth proportional to 38,561.65, 53,214.70 and 21,565.70 is: 29,760.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,561.65 : 53,214.70 = 21,565.70 : x
  2. Step 2: Convert to fraction form
    38,561.65/53,214.70 = 21,565.70/x
  3. Step 3: Cross multiply
    38,561.65x = 53,214.70 × 21,565.70
  4. Step 4: Simplify right side
    38,561.65x = 1,147,612,255.79
  5. Step 5: Solve for x
    x = 1,147,612,255.79/38,561.65
  6. Step 6: Final answer
    x = 29,760.46

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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.