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Finding the Fourth Proportional to 15,943.79, 22,002.43 and 8,870.21

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Solution

The fourth proportional to 15,943.79, 22,002.43 and 8,870.21 is: 12,240.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,943.79 : 22,002.43 = 8,870.21 : x
  2. Step 2: Convert to fraction form
    15,943.79/22,002.43 = 8,870.21/x
  3. Step 3: Cross multiply
    15,943.79x = 22,002.43 × 8,870.21
  4. Step 4: Simplify right side
    15,943.79x = 195,166,174.61
  5. Step 5: Solve for x
    x = 195,166,174.61/15,943.79
  6. Step 6: Final answer
    x = 12,240.89

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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.