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Finding the Fourth Proportional to 15,897.60, 21,945.60 and 10,310.40

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Solution

The fourth proportional to 15,897.60, 21,945.60 and 10,310.40 is: 14,232.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,897.60 : 21,945.60 = 10,310.40 : x
  2. Step 2: Convert to fraction form
    15,897.60/21,945.60 = 10,310.40/x
  3. Step 3: Cross multiply
    15,897.60x = 21,945.60 × 10,310.40
  4. Step 4: Simplify right side
    15,897.60x = 226,267,914.24
  5. Step 5: Solve for x
    x = 226,267,914.24/15,897.60
  6. Step 6: Final answer
    x = 14,232.83

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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.