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Finding the Fourth Proportional to 14,057.80, 21,079.74 and 7,482.20

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Solution

The fourth proportional to 14,057.80, 21,079.74 and 7,482.20 is: 11,219.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,057.80 : 21,079.74 = 7,482.20 : x
  2. Step 2: Convert to fraction form
    14,057.80/21,079.74 = 7,482.20/x
  3. Step 3: Cross multiply
    14,057.80x = 21,079.74 × 7,482.20
  4. Step 4: Simplify right side
    14,057.80x = 157,722,830.63
  5. Step 5: Solve for x
    x = 157,722,830.63/14,057.80
  6. Step 6: Final answer
    x = 11,219.60

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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.