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Finding the Fourth Proportional to 12,658,730.80, 18,986,702.52 and 3,561,117.52

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Solution

The fourth proportional to 12,658,730.80, 18,986,702.52 and 3,561,117.52 is: 5,341,284.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,658,730.80 : 18,986,702.52 = 3,561,117.52 : x
  2. Step 2: Convert to fraction form
    12,658,730.80/18,986,702.52 = 3,561,117.52/x
  3. Step 3: Cross multiply
    12,658,730.80x = 18,986,702.52 × 3,561,117.52
  4. Step 4: Simplify right side
    12,658,730.80x = 67,613,878,991,000.15
  5. Step 5: Solve for x
    x = 67,613,878,991,000.15/12,658,730.80
  6. Step 6: Final answer
    x = 5,341,284.21

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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.