Home / 15,438.40-21,305.02-8,364.82

Finding the Fourth Proportional to 15,438.40, 21,305.02 and 8,364.82

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Solution

The fourth proportional to 15,438.40, 21,305.02 and 8,364.82 is: 11,543.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,438.40 : 21,305.02 = 8,364.82 : x
  2. Step 2: Convert to fraction form
    15,438.40/21,305.02 = 8,364.82/x
  3. Step 3: Cross multiply
    15,438.40x = 21,305.02 × 8,364.82
  4. Step 4: Simplify right side
    15,438.40x = 178,212,615.33
  5. Step 5: Solve for x
    x = 178,212,615.33/15,438.40
  6. Step 6: Final answer
    x = 11,543.47

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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.