Home / 18,429.64-25,431.56-11,356.18

Finding the Fourth Proportional to 18,429.64, 25,431.56 and 11,356.18

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Solution

The fourth proportional to 18,429.64, 25,431.56 and 11,356.18 is: 15,670.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,429.64 : 25,431.56 = 11,356.18 : x
  2. Step 2: Convert to fraction form
    18,429.64/25,431.56 = 11,356.18/x
  3. Step 3: Cross multiply
    18,429.64x = 25,431.56 × 11,356.18
  4. Step 4: Simplify right side
    18,429.64x = 288,805,373.04
  5. Step 5: Solve for x
    x = 288,805,373.04/18,429.64
  6. Step 6: Final answer
    x = 15,670.70

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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.