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Finding the Fourth Proportional to 15,879.93, 21,913.14 and 8,708.70

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Solution

The fourth proportional to 15,879.93, 21,913.14 and 8,708.70 is: 12,017.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,879.93 : 21,913.14 = 8,708.70 : x
  2. Step 2: Convert to fraction form
    15,879.93/21,913.14 = 8,708.70/x
  3. Step 3: Cross multiply
    15,879.93x = 21,913.14 × 8,708.70
  4. Step 4: Simplify right side
    15,879.93x = 190,834,962.32
  5. Step 5: Solve for x
    x = 190,834,962.32/15,879.93
  6. Step 6: Final answer
    x = 12,017.37

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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.