Home / 21,060.95-31,591.47-5,478.57

Finding the Fourth Proportional to 21,060.95, 31,591.47 and 5,478.57

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Solution

The fourth proportional to 21,060.95, 31,591.47 and 5,478.57 is: 8,217.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,060.95 : 31,591.47 = 5,478.57 : x
  2. Step 2: Convert to fraction form
    21,060.95/31,591.47 = 5,478.57/x
  3. Step 3: Cross multiply
    21,060.95x = 31,591.47 × 5,478.57
  4. Step 4: Simplify right side
    21,060.95x = 173,076,079.80
  5. Step 5: Solve for x
    x = 173,076,079.80/21,060.95
  6. Step 6: Final answer
    x = 8,217.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.