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Finding the Fourth Proportional to 31,907.32, 47,867.90 and 9,720.11

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Solution

The fourth proportional to 31,907.32, 47,867.90 and 9,720.11 is: 14,582.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,907.32 : 47,867.90 = 9,720.11 : x
  2. Step 2: Convert to fraction form
    31,907.32/47,867.90 = 9,720.11/x
  3. Step 3: Cross multiply
    31,907.32x = 47,867.90 × 9,720.11
  4. Step 4: Simplify right side
    31,907.32x = 465,281,324.54
  5. Step 5: Solve for x
    x = 465,281,324.54/31,907.32
  6. Step 6: Final answer
    x = 14,582.28

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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.