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Finding the Fourth Proportional to 14,695.65, 20,279.39 and 7,980.93

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Solution

The fourth proportional to 14,695.65, 20,279.39 and 7,980.93 is: 11,013.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,695.65 : 20,279.39 = 7,980.93 : x
  2. Step 2: Convert to fraction form
    14,695.65/20,279.39 = 7,980.93/x
  3. Step 3: Cross multiply
    14,695.65x = 20,279.39 × 7,980.93
  4. Step 4: Simplify right side
    14,695.65x = 161,848,352.13
  5. Step 5: Solve for x
    x = 161,848,352.13/14,695.65
  6. Step 6: Final answer
    x = 11,013.35

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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.