Home / 18,387.81-25,374.10-10,320.72

Finding the Fourth Proportional to 18,387.81, 25,374.10 and 10,320.72

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Solution

The fourth proportional to 18,387.81, 25,374.10 and 10,320.72 is: 14,241.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,387.81 : 25,374.10 = 10,320.72 : x
  2. Step 2: Convert to fraction form
    18,387.81/25,374.10 = 10,320.72/x
  3. Step 3: Cross multiply
    18,387.81x = 25,374.10 × 10,320.72
  4. Step 4: Simplify right side
    18,387.81x = 261,878,981.35
  5. Step 5: Solve for x
    x = 261,878,981.35/18,387.81
  6. Step 6: Final answer
    x = 14,241.99

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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.