Home / 15,283.18-21,099.99-9,986.86

Finding the Fourth Proportional to 15,283.18, 21,099.99 and 9,986.86

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Solution

The fourth proportional to 15,283.18, 21,099.99 and 9,986.86 is: 13,787.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,283.18 : 21,099.99 = 9,986.86 : x
  2. Step 2: Convert to fraction form
    15,283.18/21,099.99 = 9,986.86/x
  3. Step 3: Cross multiply
    15,283.18x = 21,099.99 × 9,986.86
  4. Step 4: Simplify right side
    15,283.18x = 210,722,646.13
  5. Step 5: Solve for x
    x = 210,722,646.13/15,283.18
  6. Step 6: Final answer
    x = 13,787.88

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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.