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Finding the Fourth Proportional to 14,542.40, 21,820.80 and 8,307.20

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Solution

The fourth proportional to 14,542.40, 21,820.80 and 8,307.20 is: 12,464.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,542.40 : 21,820.80 = 8,307.20 : x
  2. Step 2: Convert to fraction form
    14,542.40/21,820.80 = 8,307.20/x
  3. Step 3: Cross multiply
    14,542.40x = 21,820.80 × 8,307.20
  4. Step 4: Simplify right side
    14,542.40x = 181,269,749.76
  5. Step 5: Solve for x
    x = 181,269,749.76/14,542.40
  6. Step 6: Final answer
    x = 12,464.91

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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.