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Finding the Fourth Proportional to 21,007.70, 29,432.65 and 21,007.70

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Solution

The fourth proportional to 21,007.70, 29,432.65 and 21,007.70 is: 29,432.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.70 : 29,432.65 = 21,007.70 : x
  2. Step 2: Convert to fraction form
    21,007.70/29,432.65 = 21,007.70/x
  3. Step 3: Cross multiply
    21,007.70x = 29,432.65 × 21,007.70
  4. Step 4: Simplify right side
    21,007.70x = 618,312,281.41
  5. Step 5: Solve for x
    x = 618,312,281.41/21,007.70
  6. Step 6: Final answer
    x = 29,432.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.