Home / 20,870.40-28,812.24-14,191.68

Finding the Fourth Proportional to 20,870.40, 28,812.24 and 14,191.68

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Solution

The fourth proportional to 20,870.40, 28,812.24 and 14,191.68 is: 19,592.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.40 : 28,812.24 = 14,191.68 : x
  2. Step 2: Convert to fraction form
    20,870.40/28,812.24 = 14,191.68/x
  3. Step 3: Cross multiply
    20,870.40x = 28,812.24 × 14,191.68
  4. Step 4: Simplify right side
    20,870.40x = 408,894,090.16
  5. Step 5: Solve for x
    x = 408,894,090.16/20,870.40
  6. Step 6: Final answer
    x = 19,592.06

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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.