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Finding the Fourth Proportional to 8,419.86, 12,595.23 and 7,020.18

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Solution

The fourth proportional to 8,419.86, 12,595.23 and 7,020.18 is: 10,501.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,419.86 : 12,595.23 = 7,020.18 : x
  2. Step 2: Convert to fraction form
    8,419.86/12,595.23 = 7,020.18/x
  3. Step 3: Cross multiply
    8,419.86x = 12,595.23 × 7,020.18
  4. Step 4: Simplify right side
    8,419.86x = 88,420,781.74
  5. Step 5: Solve for x
    x = 88,420,781.74/8,419.86
  6. Step 6: Final answer
    x = 10,501.46

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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.