Home / 20,960.76-28,972.08-18,423.84

Finding the Fourth Proportional to 20,960.76, 28,972.08 and 18,423.84

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Solution

The fourth proportional to 20,960.76, 28,972.08 and 18,423.84 is: 25,465.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.76 : 28,972.08 = 18,423.84 : x
  2. Step 2: Convert to fraction form
    20,960.76/28,972.08 = 18,423.84/x
  3. Step 3: Cross multiply
    20,960.76x = 28,972.08 × 18,423.84
  4. Step 4: Simplify right side
    20,960.76x = 533,776,966.39
  5. Step 5: Solve for x
    x = 533,776,966.39/20,960.76
  6. Step 6: Final answer
    x = 25,465.53

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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.