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Finding the Fourth Proportional to 15,713.45, 21,678.37 and 8,995.45

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Solution

The fourth proportional to 15,713.45, 21,678.37 and 8,995.45 is: 12,410.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,713.45 : 21,678.37 = 8,995.45 : x
  2. Step 2: Convert to fraction form
    15,713.45/21,678.37 = 8,995.45/x
  3. Step 3: Cross multiply
    15,713.45x = 21,678.37 × 8,995.45
  4. Step 4: Simplify right side
    15,713.45x = 195,006,693.42
  5. Step 5: Solve for x
    x = 195,006,693.42/15,713.45
  6. Step 6: Final answer
    x = 12,410.18

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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.