Home / 28,156.88-38,857.71-15,581.63

Finding the Fourth Proportional to 28,156.88, 38,857.71 and 15,581.63

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Solution

The fourth proportional to 28,156.88, 38,857.71 and 15,581.63 is: 21,503.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,156.88 : 38,857.71 = 15,581.63 : x
  2. Step 2: Convert to fraction form
    28,156.88/38,857.71 = 15,581.63/x
  3. Step 3: Cross multiply
    28,156.88x = 38,857.71 × 15,581.63
  4. Step 4: Simplify right side
    28,156.88x = 605,466,459.87
  5. Step 5: Solve for x
    x = 605,466,459.87/28,156.88
  6. Step 6: Final answer
    x = 21,503.32

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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.