Home / 18,931.50-28,400.90-8,543.25

Finding the Fourth Proportional to 18,931.50, 28,400.90 and 8,543.25

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Solution

The fourth proportional to 18,931.50, 28,400.90 and 8,543.25 is: 12,816.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,931.50 : 28,400.90 = 8,543.25 : x
  2. Step 2: Convert to fraction form
    18,931.50/28,400.90 = 8,543.25/x
  3. Step 3: Cross multiply
    18,931.50x = 28,400.90 × 8,543.25
  4. Step 4: Simplify right side
    18,931.50x = 242,635,946.21
  5. Step 5: Solve for x
    x = 242,635,946.21/18,931.50
  6. Step 6: Final answer
    x = 12,816.52

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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.