Home / 18,511.64-25,547.82-10,129.40

Finding the Fourth Proportional to 18,511.64, 25,547.82 and 10,129.40

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Solution

The fourth proportional to 18,511.64, 25,547.82 and 10,129.40 is: 13,979.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,511.64 : 25,547.82 = 10,129.40 : x
  2. Step 2: Convert to fraction form
    18,511.64/25,547.82 = 10,129.40/x
  3. Step 3: Cross multiply
    18,511.64x = 25,547.82 × 10,129.40
  4. Step 4: Simplify right side
    18,511.64x = 258,784,087.91
  5. Step 5: Solve for x
    x = 258,784,087.91/18,511.64
  6. Step 6: Final answer
    x = 13,979.53

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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.