Home / 15,928.47-21,985.87-9,218.63

Finding the Fourth Proportional to 15,928.47, 21,985.87 and 9,218.63

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Solution

The fourth proportional to 15,928.47, 21,985.87 and 9,218.63 is: 12,724.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,928.47 : 21,985.87 = 9,218.63 : x
  2. Step 2: Convert to fraction form
    15,928.47/21,985.87 = 9,218.63/x
  3. Step 3: Cross multiply
    15,928.47x = 21,985.87 × 9,218.63
  4. Step 4: Simplify right side
    15,928.47x = 202,679,591.45
  5. Step 5: Solve for x
    x = 202,679,591.45/15,928.47
  6. Step 6: Final answer
    x = 12,724.36

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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.