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Finding the Fourth Proportional to 47,339.59, 70,969.62 and 20,665.28

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Solution

The fourth proportional to 47,339.59, 70,969.62 and 20,665.28 is: 30,980.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,339.59 : 70,969.62 = 20,665.28 : x
  2. Step 2: Convert to fraction form
    47,339.59/70,969.62 = 20,665.28/x
  3. Step 3: Cross multiply
    47,339.59x = 70,969.62 × 20,665.28
  4. Step 4: Simplify right side
    47,339.59x = 1,466,607,246.22
  5. Step 5: Solve for x
    x = 1,466,607,246.22/47,339.59
  6. Step 6: Final answer
    x = 30,980.57

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1.5x scale

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.