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Finding the Fourth Proportional to 22,393.90, 30,870.84 and 15,658.56

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Solution

The fourth proportional to 22,393.90, 30,870.84 and 15,658.56 is: 21,585.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,393.90 : 30,870.84 = 15,658.56 : x
  2. Step 2: Convert to fraction form
    22,393.90/30,870.84 = 15,658.56/x
  3. Step 3: Cross multiply
    22,393.90x = 30,870.84 × 15,658.56
  4. Step 4: Simplify right side
    22,393.90x = 483,392,900.39
  5. Step 5: Solve for x
    x = 483,392,900.39/22,393.90
  6. Step 6: Final answer
    x = 21,585.92

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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.