Home / 15,528.08-21,428.61-8,454.49

Finding the Fourth Proportional to 15,528.08, 21,428.61 and 8,454.49

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Solution

The fourth proportional to 15,528.08, 21,428.61 and 8,454.49 is: 11,667.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,528.08 : 21,428.61 = 8,454.49 : x
  2. Step 2: Convert to fraction form
    15,528.08/21,428.61 = 8,454.49/x
  3. Step 3: Cross multiply
    15,528.08x = 21,428.61 × 8,454.49
  4. Step 4: Simplify right side
    15,528.08x = 181,167,968.96
  5. Step 5: Solve for x
    x = 181,167,968.96/15,528.08
  6. Step 6: Final answer
    x = 11,667.12

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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.