Home / 28,347.78-39,120.30-15,602.46

Finding the Fourth Proportional to 28,347.78, 39,120.30 and 15,602.46

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Solution

The fourth proportional to 28,347.78, 39,120.30 and 15,602.46 is: 21,531.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,347.78 : 39,120.30 = 15,602.46 : x
  2. Step 2: Convert to fraction form
    28,347.78/39,120.30 = 15,602.46/x
  3. Step 3: Cross multiply
    28,347.78x = 39,120.30 × 15,602.46
  4. Step 4: Simplify right side
    28,347.78x = 610,372,915.94
  5. Step 5: Solve for x
    x = 610,372,915.94/28,347.78
  6. Step 6: Final answer
    x = 21,531.59

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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.