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Finding the Fourth Proportional to 23,130.59, 31,920.21 and 12,520.22

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Solution

The fourth proportional to 23,130.59, 31,920.21 and 12,520.22 is: 17,277.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,130.59 : 31,920.21 = 12,520.22 : x
  2. Step 2: Convert to fraction form
    23,130.59/31,920.21 = 12,520.22/x
  3. Step 3: Cross multiply
    23,130.59x = 31,920.21 × 12,520.22
  4. Step 4: Simplify right side
    23,130.59x = 399,648,051.65
  5. Step 5: Solve for x
    x = 399,648,051.65/23,130.59
  6. Step 6: Final answer
    x = 17,277.90

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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.