Home / 15,284.52-21,089.42-9,987.12

Finding the Fourth Proportional to 15,284.52, 21,089.42 and 9,987.12

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Solution

The fourth proportional to 15,284.52, 21,089.42 and 9,987.12 is: 13,780.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,284.52 : 21,089.42 = 9,987.12 : x
  2. Step 2: Convert to fraction form
    15,284.52/21,089.42 = 9,987.12/x
  3. Step 3: Cross multiply
    15,284.52x = 21,089.42 × 9,987.12
  4. Step 4: Simplify right side
    15,284.52x = 210,622,568.27
  5. Step 5: Solve for x
    x = 210,622,568.27/15,284.52
  6. Step 6: Final answer
    x = 13,780.12

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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.