Home / 20,915.15-31,376.61-6,875.96

Finding the Fourth Proportional to 20,915.15, 31,376.61 and 6,875.96

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Solution

The fourth proportional to 20,915.15, 31,376.61 and 6,875.96 is: 10,315.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.15 : 31,376.61 = 6,875.96 : x
  2. Step 2: Convert to fraction form
    20,915.15/31,376.61 = 6,875.96/x
  3. Step 3: Cross multiply
    20,915.15x = 31,376.61 × 6,875.96
  4. Step 4: Simplify right side
    20,915.15x = 215,744,315.30
  5. Step 5: Solve for x
    x = 215,744,315.30/20,915.15
  6. Step 6: Final answer
    x = 10,315.22

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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.