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Finding the Fourth Proportional to 47,292.60, 70,881.30 and 20,969.40

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Solution

The fourth proportional to 47,292.60, 70,881.30 and 20,969.40 is: 31,428.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,292.60 : 70,881.30 = 20,969.40 : x
  2. Step 2: Convert to fraction form
    47,292.60/70,881.30 = 20,969.40/x
  3. Step 3: Cross multiply
    47,292.60x = 70,881.30 × 20,969.40
  4. Step 4: Simplify right side
    47,292.60x = 1,486,338,332.22
  5. Step 5: Solve for x
    x = 1,486,338,332.22/47,292.60
  6. Step 6: Final answer
    x = 31,428.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.