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Finding the Fourth Proportional to 5,154.72, 7,113.28 and 2,916.80

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Solution

The fourth proportional to 5,154.72, 7,113.28 and 2,916.80 is: 4,025.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,154.72 : 7,113.28 = 2,916.80 : x
  2. Step 2: Convert to fraction form
    5,154.72/7,113.28 = 2,916.80/x
  3. Step 3: Cross multiply
    5,154.72x = 7,113.28 × 2,916.80
  4. Step 4: Simplify right side
    5,154.72x = 20,748,015.10
  5. Step 5: Solve for x
    x = 20,748,015.10/5,154.72
  6. Step 6: Final answer
    x = 4,025.05

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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.