Home / 14,887.15-20,543.10-8,172.76

Finding the Fourth Proportional to 14,887.15, 20,543.10 and 8,172.76

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Solution

The fourth proportional to 14,887.15, 20,543.10 and 8,172.76 is: 11,277.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,887.15 : 20,543.10 = 8,172.76 : x
  2. Step 2: Convert to fraction form
    14,887.15/20,543.10 = 8,172.76/x
  3. Step 3: Cross multiply
    14,887.15x = 20,543.10 × 8,172.76
  4. Step 4: Simplify right side
    14,887.15x = 167,893,743.95
  5. Step 5: Solve for x
    x = 167,893,743.95/14,887.15
  6. Step 6: Final answer
    x = 11,277.76

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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.