Home / 27,856.86-38,442.64-15,920.64

Finding the Fourth Proportional to 27,856.86, 38,442.64 and 15,920.64

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Solution

The fourth proportional to 27,856.86, 38,442.64 and 15,920.64 is: 21,970.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,856.86 : 38,442.64 = 15,920.64 : x
  2. Step 2: Convert to fraction form
    27,856.86/38,442.64 = 15,920.64/x
  3. Step 3: Cross multiply
    27,856.86x = 38,442.64 × 15,920.64
  4. Step 4: Simplify right side
    27,856.86x = 612,031,432.09
  5. Step 5: Solve for x
    x = 612,031,432.09/27,856.86
  6. Step 6: Final answer
    x = 21,970.58

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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.