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Finding the Fourth Proportional to 25,386.56, 38,079.96 and 7,856.48

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Solution

The fourth proportional to 25,386.56, 38,079.96 and 7,856.48 is: 11,784.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,386.56 : 38,079.96 = 7,856.48 : x
  2. Step 2: Convert to fraction form
    25,386.56/38,079.96 = 7,856.48/x
  3. Step 3: Cross multiply
    25,386.56x = 38,079.96 × 7,856.48
  4. Step 4: Simplify right side
    25,386.56x = 299,174,444.14
  5. Step 5: Solve for x
    x = 299,174,444.14/25,386.56
  6. Step 6: Final answer
    x = 11,784.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.