Home / 27,742.78-38,281.38-15,643.88

Finding the Fourth Proportional to 27,742.78, 38,281.38 and 15,643.88

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Solution

The fourth proportional to 27,742.78, 38,281.38 and 15,643.88 is: 21,586.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,742.78 : 38,281.38 = 15,643.88 : x
  2. Step 2: Convert to fraction form
    27,742.78/38,281.38 = 15,643.88/x
  3. Step 3: Cross multiply
    27,742.78x = 38,281.38 × 15,643.88
  4. Step 4: Simplify right side
    27,742.78x = 598,869,555.77
  5. Step 5: Solve for x
    x = 598,869,555.77/27,742.78
  6. Step 6: Final answer
    x = 21,586.50

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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.