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Finding the Fourth Proportional to 28,892.80, 43,326.40 and 13,315.20

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Solution

The fourth proportional to 28,892.80, 43,326.40 and 13,315.20 is: 19,966.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,892.80 : 43,326.40 = 13,315.20 : x
  2. Step 2: Convert to fraction form
    28,892.80/43,326.40 = 13,315.20/x
  3. Step 3: Cross multiply
    28,892.80x = 43,326.40 × 13,315.20
  4. Step 4: Simplify right side
    28,892.80x = 576,899,681.28
  5. Step 5: Solve for x
    x = 576,899,681.28/28,892.80
  6. Step 6: Final answer
    x = 19,966.90

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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.