Home / 15,369.90-21,210.25-8,655.61

Finding the Fourth Proportional to 15,369.90, 21,210.25 and 8,655.61

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Solution

The fourth proportional to 15,369.90, 21,210.25 and 8,655.61 is: 11,944.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,369.90 : 21,210.25 = 8,655.61 : x
  2. Step 2: Convert to fraction form
    15,369.90/21,210.25 = 8,655.61/x
  3. Step 3: Cross multiply
    15,369.90x = 21,210.25 × 8,655.61
  4. Step 4: Simplify right side
    15,369.90x = 183,587,652.00
  5. Step 5: Solve for x
    x = 183,587,652.00/15,369.90
  6. Step 6: Final answer
    x = 11,944.62

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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.