Home / 27,919.38-38,533.30-21,555.20

Finding the Fourth Proportional to 27,919.38, 38,533.30 and 21,555.20

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Solution

The fourth proportional to 27,919.38, 38,533.30 and 21,555.20 is: 29,749.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,919.38 : 38,533.30 = 21,555.20 : x
  2. Step 2: Convert to fraction form
    27,919.38/38,533.30 = 21,555.20/x
  3. Step 3: Cross multiply
    27,919.38x = 38,533.30 × 21,555.20
  4. Step 4: Simplify right side
    27,919.38x = 830,592,988.16
  5. Step 5: Solve for x
    x = 830,592,988.16/27,919.38
  6. Step 6: Final answer
    x = 29,749.69

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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.