Home / 15,969.35-21,987.55-13,574.59

Finding the Fourth Proportional to 15,969.35, 21,987.55 and 13,574.59

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Solution

The fourth proportional to 15,969.35, 21,987.55 and 13,574.59 is: 18,690.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,969.35 : 21,987.55 = 13,574.59 : x
  2. Step 2: Convert to fraction form
    15,969.35/21,987.55 = 13,574.59/x
  3. Step 3: Cross multiply
    15,969.35x = 21,987.55 × 13,574.59
  4. Step 4: Simplify right side
    15,969.35x = 298,471,938.35
  5. Step 5: Solve for x
    x = 298,471,938.35/15,969.35
  6. Step 6: Final answer
    x = 18,690.30

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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.