Home / 21,987.36-32,988.96-13,655.52

Finding the Fourth Proportional to 21,987.36, 32,988.96 and 13,655.52

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Solution

The fourth proportional to 21,987.36, 32,988.96 and 13,655.52 is: 20,488.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,987.36 : 32,988.96 = 13,655.52 : x
  2. Step 2: Convert to fraction form
    21,987.36/32,988.96 = 13,655.52/x
  3. Step 3: Cross multiply
    21,987.36x = 32,988.96 × 13,655.52
  4. Step 4: Simplify right side
    21,987.36x = 450,481,403.06
  5. Step 5: Solve for x
    x = 450,481,403.06/21,987.36
  6. Step 6: Final answer
    x = 20,488.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.