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Finding the Fourth Proportional to 28,567.80, 42,851.70 and 11,922.30

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Solution

The fourth proportional to 28,567.80, 42,851.70 and 11,922.30 is: 17,883.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,567.80 : 42,851.70 = 11,922.30 : x
  2. Step 2: Convert to fraction form
    28,567.80/42,851.70 = 11,922.30/x
  3. Step 3: Cross multiply
    28,567.80x = 42,851.70 × 11,922.30
  4. Step 4: Simplify right side
    28,567.80x = 510,890,822.91
  5. Step 5: Solve for x
    x = 510,890,822.91/28,567.80
  6. Step 6: Final answer
    x = 17,883.45

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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.