Home / 15,393.85-21,243.35-8,681.65

Finding the Fourth Proportional to 15,393.85, 21,243.35 and 8,681.65

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Solution

The fourth proportional to 15,393.85, 21,243.35 and 8,681.65 is: 11,980.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,393.85 : 21,243.35 = 8,681.65 : x
  2. Step 2: Convert to fraction form
    15,393.85/21,243.35 = 8,681.65/x
  3. Step 3: Cross multiply
    15,393.85x = 21,243.35 × 8,681.65
  4. Step 4: Simplify right side
    15,393.85x = 184,427,329.53
  5. Step 5: Solve for x
    x = 184,427,329.53/15,393.85
  6. Step 6: Final answer
    x = 11,980.59

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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.