Home / 15,286.15-21,095.90-8,572.21

Finding the Fourth Proportional to 15,286.15, 21,095.90 and 8,572.21

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Solution

The fourth proportional to 15,286.15, 21,095.90 and 8,572.21 is: 11,830.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,286.15 : 21,095.90 = 8,572.21 : x
  2. Step 2: Convert to fraction form
    15,286.15/21,095.90 = 8,572.21/x
  3. Step 3: Cross multiply
    15,286.15x = 21,095.90 × 8,572.21
  4. Step 4: Simplify right side
    15,286.15x = 180,838,484.94
  5. Step 5: Solve for x
    x = 180,838,484.94/15,286.15
  6. Step 6: Final answer
    x = 11,830.22

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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.