Home / 15,528.14-21,428.86-8,454.59

Finding the Fourth Proportional to 15,528.14, 21,428.86 and 8,454.59

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Solution

The fourth proportional to 15,528.14, 21,428.86 and 8,454.59 is: 11,667.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,528.14 : 21,428.86 = 8,454.59 : x
  2. Step 2: Convert to fraction form
    15,528.14/21,428.86 = 8,454.59/x
  3. Step 3: Cross multiply
    15,528.14x = 21,428.86 × 8,454.59
  4. Step 4: Simplify right side
    15,528.14x = 181,172,204.33
  5. Step 5: Solve for x
    x = 181,172,204.33/15,528.14
  6. Step 6: Final answer
    x = 11,667.35

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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.