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Finding the Fourth Proportional to 10,643.80, 15,927.90 and 9,272.20

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Solution

The fourth proportional to 10,643.80, 15,927.90 and 9,272.20 is: 13,875.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,643.80 : 15,927.90 = 9,272.20 : x
  2. Step 2: Convert to fraction form
    10,643.80/15,927.90 = 9,272.20/x
  3. Step 3: Cross multiply
    10,643.80x = 15,927.90 × 9,272.20
  4. Step 4: Simplify right side
    10,643.80x = 147,686,674.38
  5. Step 5: Solve for x
    x = 147,686,674.38/10,643.80
  6. Step 6: Final answer
    x = 13,875.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.