Home / 8,657.20-12,985.80-5,376.70

Finding the Fourth Proportional to 8,657.20, 12,985.80 and 5,376.70

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Solution

The fourth proportional to 8,657.20, 12,985.80 and 5,376.70 is: 8,065.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,657.20 : 12,985.80 = 5,376.70 : x
  2. Step 2: Convert to fraction form
    8,657.20/12,985.80 = 5,376.70/x
  3. Step 3: Cross multiply
    8,657.20x = 12,985.80 × 5,376.70
  4. Step 4: Simplify right side
    8,657.20x = 69,820,750.86
  5. Step 5: Solve for x
    x = 69,820,750.86/8,657.20
  6. Step 6: Final answer
    x = 8,065.05

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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.