Home / 20,915.40-31,370.81-6,124.47

Finding the Fourth Proportional to 20,915.40, 31,370.81 and 6,124.47

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Solution

The fourth proportional to 20,915.40, 31,370.81 and 6,124.47 is: 9,186.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.40 : 31,370.81 = 6,124.47 : x
  2. Step 2: Convert to fraction form
    20,915.40/31,370.81 = 6,124.47/x
  3. Step 3: Cross multiply
    20,915.40x = 31,370.81 × 6,124.47
  4. Step 4: Simplify right side
    20,915.40x = 192,129,397.24
  5. Step 5: Solve for x
    x = 192,129,397.24/20,915.40
  6. Step 6: Final answer
    x = 9,186.03

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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.