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Finding the Fourth Proportional to 15,849.61, 21,870.92 and 9,474.93

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Solution

The fourth proportional to 15,849.61, 21,870.92 and 9,474.93 is: 13,074.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,849.61 : 21,870.92 = 9,474.93 : x
  2. Step 2: Convert to fraction form
    15,849.61/21,870.92 = 9,474.93/x
  3. Step 3: Cross multiply
    15,849.61x = 21,870.92 × 9,474.93
  4. Step 4: Simplify right side
    15,849.61x = 207,225,459.72
  5. Step 5: Solve for x
    x = 207,225,459.72/15,849.61
  6. Step 6: Final answer
    x = 13,074.49

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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.