Home / 13,587.40-18,754.56-8,807.20

Finding the Fourth Proportional to 13,587.40, 18,754.56 and 8,807.20

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Solution

The fourth proportional to 13,587.40, 18,754.56 and 8,807.20 is: 12,156.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,587.40 : 18,754.56 = 8,807.20 : x
  2. Step 2: Convert to fraction form
    13,587.40/18,754.56 = 8,807.20/x
  3. Step 3: Cross multiply
    13,587.40x = 18,754.56 × 8,807.20
  4. Step 4: Simplify right side
    13,587.40x = 165,175,160.83
  5. Step 5: Solve for x
    x = 165,175,160.83/13,587.40
  6. Step 6: Final answer
    x = 12,156.50

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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.