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Finding the Fourth Proportional to 15,876.64, 21,909.64 and 8,803.08

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Solution

The fourth proportional to 15,876.64, 21,909.64 and 8,803.08 is: 12,148.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,876.64 : 21,909.64 = 8,803.08 : x
  2. Step 2: Convert to fraction form
    15,876.64/21,909.64 = 8,803.08/x
  3. Step 3: Cross multiply
    15,876.64x = 21,909.64 × 8,803.08
  4. Step 4: Simplify right side
    15,876.64x = 192,872,313.69
  5. Step 5: Solve for x
    x = 192,872,313.69/15,876.64
  6. Step 6: Final answer
    x = 12,148.18

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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.