Home / 10,681.22-15,990.28-7,889.35

Finding the Fourth Proportional to 10,681.22, 15,990.28 and 7,889.35

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Solution

The fourth proportional to 10,681.22, 15,990.28 and 7,889.35 is: 11,810.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,681.22 : 15,990.28 = 7,889.35 : x
  2. Step 2: Convert to fraction form
    10,681.22/15,990.28 = 7,889.35/x
  3. Step 3: Cross multiply
    10,681.22x = 15,990.28 × 7,889.35
  4. Step 4: Simplify right side
    10,681.22x = 126,152,915.52
  5. Step 5: Solve for x
    x = 126,152,915.52/10,681.22
  6. Step 6: Final answer
    x = 11,810.72

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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.