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Finding the Fourth Proportional to 15,876.47, 21,918.50 and 10,847.99

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Solution

The fourth proportional to 15,876.47, 21,918.50 and 10,847.99 is: 14,976.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,876.47 : 21,918.50 = 10,847.99 : x
  2. Step 2: Convert to fraction form
    15,876.47/21,918.50 = 10,847.99/x
  3. Step 3: Cross multiply
    15,876.47x = 21,918.50 × 10,847.99
  4. Step 4: Simplify right side
    15,876.47x = 237,771,710.05
  5. Step 5: Solve for x
    x = 237,771,710.05/15,876.47
  6. Step 6: Final answer
    x = 14,976.36

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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.