Home / 15,220.40-21,000.30-8,931.56

Finding the Fourth Proportional to 15,220.40, 21,000.30 and 8,931.56

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Solution

The fourth proportional to 15,220.40, 21,000.30 and 8,931.56 is: 12,323.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,220.40 : 21,000.30 = 8,931.56 : x
  2. Step 2: Convert to fraction form
    15,220.40/21,000.30 = 8,931.56/x
  3. Step 3: Cross multiply
    15,220.40x = 21,000.30 × 8,931.56
  4. Step 4: Simplify right side
    15,220.40x = 187,565,439.47
  5. Step 5: Solve for x
    x = 187,565,439.47/15,220.40
  6. Step 6: Final answer
    x = 12,323.29

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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.