Home / 5,378.90-8,068.35-1,681.15

Finding the Fourth Proportional to 5,378.90, 8,068.35 and 1,681.15

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Solution

The fourth proportional to 5,378.90, 8,068.35 and 1,681.15 is: 2,521.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,378.90 : 8,068.35 = 1,681.15 : x
  2. Step 2: Convert to fraction form
    5,378.90/8,068.35 = 1,681.15/x
  3. Step 3: Cross multiply
    5,378.90x = 8,068.35 × 1,681.15
  4. Step 4: Simplify right side
    5,378.90x = 13,564,057.86
  5. Step 5: Solve for x
    x = 13,564,057.86/5,378.90
  6. Step 6: Final answer
    x = 2,521.72

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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.