Home / 8,875.20-13,312.79-3,031.86

Finding the Fourth Proportional to 8,875.20, 13,312.79 and 3,031.86

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Solution

The fourth proportional to 8,875.20, 13,312.79 and 3,031.86 is: 4,547.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,875.20 : 13,312.79 = 3,031.86 : x
  2. Step 2: Convert to fraction form
    8,875.20/13,312.79 = 3,031.86/x
  3. Step 3: Cross multiply
    8,875.20x = 13,312.79 × 3,031.86
  4. Step 4: Simplify right side
    8,875.20x = 40,362,456.51
  5. Step 5: Solve for x
    x = 40,362,456.51/8,875.20
  6. Step 6: Final answer
    x = 4,547.78

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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.