Home / 27,856.60-38,445.51-15,917.20

Finding the Fourth Proportional to 27,856.60, 38,445.51 and 15,917.20

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Solution

The fourth proportional to 27,856.60, 38,445.51 and 15,917.20 is: 21,967.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,856.60 : 38,445.51 = 15,917.20 : x
  2. Step 2: Convert to fraction form
    27,856.60/38,445.51 = 15,917.20/x
  3. Step 3: Cross multiply
    27,856.60x = 38,445.51 × 15,917.20
  4. Step 4: Simplify right side
    27,856.60x = 611,944,871.77
  5. Step 5: Solve for x
    x = 611,944,871.77/27,856.60
  6. Step 6: Final answer
    x = 21,967.68

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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.