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Finding the Fourth Proportional to 28,595.36, 42,879 and 8,870.24

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Solution

The fourth proportional to 28,595.36, 42,879 and 8,870.24 is: 13,301.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,595.36 : 42,879 = 8,870.24 : x
  2. Step 2: Convert to fraction form
    28,595.36/42,879 = 8,870.24/x
  3. Step 3: Cross multiply
    28,595.36x = 42,879 × 8,870.24
  4. Step 4: Simplify right side
    28,595.36x = 380,347,020.96
  5. Step 5: Solve for x
    x = 380,347,020.96/28,595.36
  6. Step 6: Final answer
    x = 13,301.00

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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.