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Finding the Fourth Proportional to 7,248, 10,005.12 and 4,771.20

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Solution

The fourth proportional to 7,248, 10,005.12 and 4,771.20 is: 6,586.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,248 : 10,005.12 = 4,771.20 : x
  2. Step 2: Convert to fraction form
    7,248/10,005.12 = 4,771.20/x
  3. Step 3: Cross multiply
    7,248x = 10,005.12 × 4,771.20
  4. Step 4: Simplify right side
    7,248x = 47,736,428.54
  5. Step 5: Solve for x
    x = 47,736,428.54/7,248
  6. Step 6: Final answer
    x = 6,586.15

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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.