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Finding the Fourth Proportional to 14,700.14, 20,285.61 and 7,985.61

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Solution

The fourth proportional to 14,700.14, 20,285.61 and 7,985.61 is: 11,019.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,700.14 : 20,285.61 = 7,985.61 : x
  2. Step 2: Convert to fraction form
    14,700.14/20,285.61 = 7,985.61/x
  3. Step 3: Cross multiply
    14,700.14x = 20,285.61 × 7,985.61
  4. Step 4: Simplify right side
    14,700.14x = 161,992,970.07
  5. Step 5: Solve for x
    x = 161,992,970.07/14,700.14
  6. Step 6: Final answer
    x = 11,019.83

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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.