Home / 20,911.47-28,818-20,527.17

Finding the Fourth Proportional to 20,911.47, 28,818 and 20,527.17

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Solution

The fourth proportional to 20,911.47, 28,818 and 20,527.17 is: 28,288.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.47 : 28,818 = 20,527.17 : x
  2. Step 2: Convert to fraction form
    20,911.47/28,818 = 20,527.17/x
  3. Step 3: Cross multiply
    20,911.47x = 28,818 × 20,527.17
  4. Step 4: Simplify right side
    20,911.47x = 591,551,985.06
  5. Step 5: Solve for x
    x = 591,551,985.06/20,911.47
  6. Step 6: Final answer
    x = 28,288.40

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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.