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Finding the Fourth Proportional to 9,909.90, 14,866.20 and 3,668.40

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Solution

The fourth proportional to 9,909.90, 14,866.20 and 3,668.40 is: 5,503.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,909.90 : 14,866.20 = 3,668.40 : x
  2. Step 2: Convert to fraction form
    9,909.90/14,866.20 = 3,668.40/x
  3. Step 3: Cross multiply
    9,909.90x = 14,866.20 × 3,668.40
  4. Step 4: Simplify right side
    9,909.90x = 54,535,168.08
  5. Step 5: Solve for x
    x = 54,535,168.08/9,909.90
  6. Step 6: Final answer
    x = 5,503.10

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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.