Home / 13,557.64-18,724.14-9,319.88

Finding the Fourth Proportional to 13,557.64, 18,724.14 and 9,319.88

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Solution

The fourth proportional to 13,557.64, 18,724.14 and 9,319.88 is: 12,871.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,557.64 : 18,724.14 = 9,319.88 : x
  2. Step 2: Convert to fraction form
    13,557.64/18,724.14 = 9,319.88/x
  3. Step 3: Cross multiply
    13,557.64x = 18,724.14 × 9,319.88
  4. Step 4: Simplify right side
    13,557.64x = 174,506,737.90
  5. Step 5: Solve for x
    x = 174,506,737.90/13,557.64
  6. Step 6: Final answer
    x = 12,871.47

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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.