Home / 8,981.74-12,374.53-6,619.78

Finding the Fourth Proportional to 8,981.74, 12,374.53 and 6,619.78

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Solution

The fourth proportional to 8,981.74, 12,374.53 and 6,619.78 is: 9,120.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,981.74 : 12,374.53 = 6,619.78 : x
  2. Step 2: Convert to fraction form
    8,981.74/12,374.53 = 6,619.78/x
  3. Step 3: Cross multiply
    8,981.74x = 12,374.53 × 6,619.78
  4. Step 4: Simplify right side
    8,981.74x = 81,916,666.20
  5. Step 5: Solve for x
    x = 81,916,666.20/8,981.74
  6. Step 6: Final answer
    x = 9,120.36

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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.