Home / 15,372.93-21,215.07-9,404.49

Finding the Fourth Proportional to 15,372.93, 21,215.07 and 9,404.49

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Solution

The fourth proportional to 15,372.93, 21,215.07 and 9,404.49 is: 12,978.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,372.93 : 21,215.07 = 9,404.49 : x
  2. Step 2: Convert to fraction form
    15,372.93/21,215.07 = 9,404.49/x
  3. Step 3: Cross multiply
    15,372.93x = 21,215.07 × 9,404.49
  4. Step 4: Simplify right side
    15,372.93x = 199,516,913.66
  5. Step 5: Solve for x
    x = 199,516,913.66/15,372.93
  6. Step 6: Final answer
    x = 12,978.46

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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.