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Finding the Fourth Proportional to 51,321.96, 70,820.28 and 28,659.20

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Solution

The fourth proportional to 51,321.96, 70,820.28 and 28,659.20 is: 39,547.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,321.96 : 70,820.28 = 28,659.20 : x
  2. Step 2: Convert to fraction form
    51,321.96/70,820.28 = 28,659.20/x
  3. Step 3: Cross multiply
    51,321.96x = 70,820.28 × 28,659.20
  4. Step 4: Simplify right side
    51,321.96x = 2,029,652,214.47
  5. Step 5: Solve for x
    x = 2,029,652,214.47/51,321.96
  6. Step 6: Final answer
    x = 39,547.44

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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.