Home / 30,812.55-42,521.20-16,665.40

Finding the Fourth Proportional to 30,812.55, 42,521.20 and 16,665.40

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Solution

The fourth proportional to 30,812.55, 42,521.20 and 16,665.40 is: 22,998.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,812.55 : 42,521.20 = 16,665.40 : x
  2. Step 2: Convert to fraction form
    30,812.55/42,521.20 = 16,665.40/x
  3. Step 3: Cross multiply
    30,812.55x = 42,521.20 × 16,665.40
  4. Step 4: Simplify right side
    30,812.55x = 708,632,672.53
  5. Step 5: Solve for x
    x = 708,632,672.53/30,812.55
  6. Step 6: Final answer
    x = 22,998.18

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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.