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Finding the Fourth Proportional to 13,590.70, 18,737.80 and 8,802.18

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Solution

The fourth proportional to 13,590.70, 18,737.80 and 8,802.18 is: 12,135.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,590.70 : 18,737.80 = 8,802.18 : x
  2. Step 2: Convert to fraction form
    13,590.70/18,737.80 = 8,802.18/x
  3. Step 3: Cross multiply
    13,590.70x = 18,737.80 × 8,802.18
  4. Step 4: Simplify right side
    13,590.70x = 164,933,488.40
  5. Step 5: Solve for x
    x = 164,933,488.40/13,590.70
  6. Step 6: Final answer
    x = 12,135.76

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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.