Home / 15,605.95-21,427.31-15,199.87

Finding the Fourth Proportional to 15,605.95, 21,427.31 and 15,199.87

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Solution

The fourth proportional to 15,605.95, 21,427.31 and 15,199.87 is: 20,869.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,605.95 : 21,427.31 = 15,199.87 : x
  2. Step 2: Convert to fraction form
    15,605.95/21,427.31 = 15,199.87/x
  3. Step 3: Cross multiply
    15,605.95x = 21,427.31 × 15,199.87
  4. Step 4: Simplify right side
    15,605.95x = 325,692,326.45
  5. Step 5: Solve for x
    x = 325,692,326.45/15,605.95
  6. Step 6: Final answer
    x = 20,869.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.