Home / 15,712.02-21,681.59-8,638.43

Finding the Fourth Proportional to 15,712.02, 21,681.59 and 8,638.43

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Solution

The fourth proportional to 15,712.02, 21,681.59 and 8,638.43 is: 11,920.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,712.02 : 21,681.59 = 8,638.43 : x
  2. Step 2: Convert to fraction form
    15,712.02/21,681.59 = 8,638.43/x
  3. Step 3: Cross multiply
    15,712.02x = 21,681.59 × 8,638.43
  4. Step 4: Simplify right side
    15,712.02x = 187,294,745.90
  5. Step 5: Solve for x
    x = 187,294,745.90/15,712.02
  6. Step 6: Final answer
    x = 11,920.48

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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.