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Finding the Fourth Proportional to 18,700.80, 25,807.36 and 10,317.12

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Solution

The fourth proportional to 18,700.80, 25,807.36 and 10,317.12 is: 14,237.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,700.80 : 25,807.36 = 10,317.12 : x
  2. Step 2: Convert to fraction form
    18,700.80/25,807.36 = 10,317.12/x
  3. Step 3: Cross multiply
    18,700.80x = 25,807.36 × 10,317.12
  4. Step 4: Simplify right side
    18,700.80x = 266,257,630.00
  5. Step 5: Solve for x
    x = 266,257,630.00/18,700.80
  6. Step 6: Final answer
    x = 14,237.77

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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.