Home / 18,511.14-25,547.13-10,128.90

Finding the Fourth Proportional to 18,511.14, 25,547.13 and 10,128.90

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Solution

The fourth proportional to 18,511.14, 25,547.13 and 10,128.90 is: 13,978.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,511.14 : 25,547.13 = 10,128.90 : x
  2. Step 2: Convert to fraction form
    18,511.14/25,547.13 = 10,128.90/x
  3. Step 3: Cross multiply
    18,511.14x = 25,547.13 × 10,128.90
  4. Step 4: Simplify right side
    18,511.14x = 258,764,325.06
  5. Step 5: Solve for x
    x = 258,764,325.06/18,511.14
  6. Step 6: Final answer
    x = 13,978.84

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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.