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Finding the Fourth Proportional to 15,897.80, 23,846.70 and 9,979.40

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Solution

The fourth proportional to 15,897.80, 23,846.70 and 9,979.40 is: 14,969.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,897.80 : 23,846.70 = 9,979.40 : x
  2. Step 2: Convert to fraction form
    15,897.80/23,846.70 = 9,979.40/x
  3. Step 3: Cross multiply
    15,897.80x = 23,846.70 × 9,979.40
  4. Step 4: Simplify right side
    15,897.80x = 237,975,757.98
  5. Step 5: Solve for x
    x = 237,975,757.98/15,897.80
  6. Step 6: Final answer
    x = 14,969.10

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1.5x scale

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.