Home / 8,390.19-12,587.31-2,547.39

Finding the Fourth Proportional to 8,390.19, 12,587.31 and 2,547.39

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Solution

The fourth proportional to 8,390.19, 12,587.31 and 2,547.39 is: 3,821.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,390.19 : 12,587.31 = 2,547.39 : x
  2. Step 2: Convert to fraction form
    8,390.19/12,587.31 = 2,547.39/x
  3. Step 3: Cross multiply
    8,390.19x = 12,587.31 × 2,547.39
  4. Step 4: Simplify right side
    8,390.19x = 32,064,787.62
  5. Step 5: Solve for x
    x = 32,064,787.62/8,390.19
  6. Step 6: Final answer
    x = 3,821.70

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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.