Home / 8,390.32-12,578.28-4,689.52

Finding the Fourth Proportional to 8,390.32, 12,578.28 and 4,689.52

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Solution

The fourth proportional to 8,390.32, 12,578.28 and 4,689.52 is: 7,030.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,390.32 : 12,578.28 = 4,689.52 : x
  2. Step 2: Convert to fraction form
    8,390.32/12,578.28 = 4,689.52/x
  3. Step 3: Cross multiply
    8,390.32x = 12,578.28 × 4,689.52
  4. Step 4: Simplify right side
    8,390.32x = 58,986,095.63
  5. Step 5: Solve for x
    x = 58,986,095.63/8,390.32
  6. Step 6: Final answer
    x = 7,030.26

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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.