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Finding the Fourth Proportional to 7,345.20, 11,017.80 and 5,012.40

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Solution

The fourth proportional to 7,345.20, 11,017.80 and 5,012.40 is: 7,518.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,345.20 : 11,017.80 = 5,012.40 : x
  2. Step 2: Convert to fraction form
    7,345.20/11,017.80 = 5,012.40/x
  3. Step 3: Cross multiply
    7,345.20x = 11,017.80 × 5,012.40
  4. Step 4: Simplify right side
    7,345.20x = 55,225,620.72
  5. Step 5: Solve for x
    x = 55,225,620.72/7,345.20
  6. Step 6: Final answer
    x = 7,518.60

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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.