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Finding the Fourth Proportional to 8,697.20, 13,045.80 and 2,854.40

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Solution

The fourth proportional to 8,697.20, 13,045.80 and 2,854.40 is: 4,281.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,697.20 : 13,045.80 = 2,854.40 : x
  2. Step 2: Convert to fraction form
    8,697.20/13,045.80 = 2,854.40/x
  3. Step 3: Cross multiply
    8,697.20x = 13,045.80 × 2,854.40
  4. Step 4: Simplify right side
    8,697.20x = 37,237,931.52
  5. Step 5: Solve for x
    x = 37,237,931.52/8,697.20
  6. Step 6: Final answer
    x = 4,281.60

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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.