Home / 28,421.52-42,631.56-8,699.28

Finding the Fourth Proportional to 28,421.52, 42,631.56 and 8,699.28

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Solution

The fourth proportional to 28,421.52, 42,631.56 and 8,699.28 is: 13,048.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,421.52 : 42,631.56 = 8,699.28 : x
  2. Step 2: Convert to fraction form
    28,421.52/42,631.56 = 8,699.28/x
  3. Step 3: Cross multiply
    28,421.52x = 42,631.56 × 8,699.28
  4. Step 4: Simplify right side
    28,421.52x = 370,863,877.28
  5. Step 5: Solve for x
    x = 370,863,877.28/28,421.52
  6. Step 6: Final answer
    x = 13,048.70

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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.