Home / 21,938.50-30,275.13-12,002.50

Finding the Fourth Proportional to 21,938.50, 30,275.13 and 12,002.50

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Solution

The fourth proportional to 21,938.50, 30,275.13 and 12,002.50 is: 16,563.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,938.50 : 30,275.13 = 12,002.50 : x
  2. Step 2: Convert to fraction form
    21,938.50/30,275.13 = 12,002.50/x
  3. Step 3: Cross multiply
    21,938.50x = 30,275.13 × 12,002.50
  4. Step 4: Simplify right side
    21,938.50x = 363,377,247.83
  5. Step 5: Solve for x
    x = 363,377,247.83/21,938.50
  6. Step 6: Final answer
    x = 16,563.45

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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.