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Finding the Fourth Proportional to 14,692.61, 20,275.72 and 7,978.19

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Solution

The fourth proportional to 14,692.61, 20,275.72 and 7,978.19 is: 11,009.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,692.61 : 20,275.72 = 7,978.19 : x
  2. Step 2: Convert to fraction form
    14,692.61/20,275.72 = 7,978.19/x
  3. Step 3: Cross multiply
    14,692.61x = 20,275.72 × 7,978.19
  4. Step 4: Simplify right side
    14,692.61x = 161,763,546.55
  5. Step 5: Solve for x
    x = 161,763,546.55/14,692.61
  6. Step 6: Final answer
    x = 11,009.86

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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.