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Finding the Fourth Proportional to 8,595.40, 12,876.90 and 4,421.20

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Solution

The fourth proportional to 8,595.40, 12,876.90 and 4,421.20 is: 6,623.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,595.40 : 12,876.90 = 4,421.20 : x
  2. Step 2: Convert to fraction form
    8,595.40/12,876.90 = 4,421.20/x
  3. Step 3: Cross multiply
    8,595.40x = 12,876.90 × 4,421.20
  4. Step 4: Simplify right side
    8,595.40x = 56,931,350.28
  5. Step 5: Solve for x
    x = 56,931,350.28/8,595.40
  6. Step 6: Final answer
    x = 6,623.47

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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.