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Finding the Fourth Proportional to 9,989.60, 14,980.04 and 5,308.48

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Solution

The fourth proportional to 9,989.60, 14,980.04 and 5,308.48 is: 7,960.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,989.60 : 14,980.04 = 5,308.48 : x
  2. Step 2: Convert to fraction form
    9,989.60/14,980.04 = 5,308.48/x
  3. Step 3: Cross multiply
    9,989.60x = 14,980.04 × 5,308.48
  4. Step 4: Simplify right side
    9,989.60x = 79,521,242.74
  5. Step 5: Solve for x
    x = 79,521,242.74/9,989.60
  6. Step 6: Final answer
    x = 7,960.40

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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.