Home / 13,490.12-18,615.60-7,439.16

Finding the Fourth Proportional to 13,490.12, 18,615.60 and 7,439.16

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Solution

The fourth proportional to 13,490.12, 18,615.60 and 7,439.16 is: 10,265.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,490.12 : 18,615.60 = 7,439.16 : x
  2. Step 2: Convert to fraction form
    13,490.12/18,615.60 = 7,439.16/x
  3. Step 3: Cross multiply
    13,490.12x = 18,615.60 × 7,439.16
  4. Step 4: Simplify right side
    13,490.12x = 138,484,426.90
  5. Step 5: Solve for x
    x = 138,484,426.90/13,490.12
  6. Step 6: Final answer
    x = 10,265.62

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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.