Home / 13,398.04-18,487.52-7,429.40

Finding the Fourth Proportional to 13,398.04, 18,487.52 and 7,429.40

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Solution

The fourth proportional to 13,398.04, 18,487.52 and 7,429.40 is: 10,251.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,398.04 : 18,487.52 = 7,429.40 : x
  2. Step 2: Convert to fraction form
    13,398.04/18,487.52 = 7,429.40/x
  3. Step 3: Cross multiply
    13,398.04x = 18,487.52 × 7,429.40
  4. Step 4: Simplify right side
    13,398.04x = 137,351,181.09
  5. Step 5: Solve for x
    x = 137,351,181.09/13,398.04
  6. Step 6: Final answer
    x = 10,251.59

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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.