Home / 15,136.56-20,888.73-8,422.47

Finding the Fourth Proportional to 15,136.56, 20,888.73 and 8,422.47

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Solution

The fourth proportional to 15,136.56, 20,888.73 and 8,422.47 is: 11,623.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,136.56 : 20,888.73 = 8,422.47 : x
  2. Step 2: Convert to fraction form
    15,136.56/20,888.73 = 8,422.47/x
  3. Step 3: Cross multiply
    15,136.56x = 20,888.73 × 8,422.47
  4. Step 4: Simplify right side
    15,136.56x = 175,934,701.76
  5. Step 5: Solve for x
    x = 175,934,701.76/15,136.56
  6. Step 6: Final answer
    x = 11,623.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.