Home / 13,387.60-18,466.88-8,077.20

Finding the Fourth Proportional to 13,387.60, 18,466.88 and 8,077.20

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Solution

The fourth proportional to 13,387.60, 18,466.88 and 8,077.20 is: 11,141.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.60 : 18,466.88 = 8,077.20 : x
  2. Step 2: Convert to fraction form
    13,387.60/18,466.88 = 8,077.20/x
  3. Step 3: Cross multiply
    13,387.60x = 18,466.88 × 8,077.20
  4. Step 4: Simplify right side
    13,387.60x = 149,160,683.14
  5. Step 5: Solve for x
    x = 149,160,683.14/13,387.60
  6. Step 6: Final answer
    x = 11,141.70

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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.