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Finding the Fourth Proportional to 9,989.52, 14,987.88 and 4,288.08

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Solution

The fourth proportional to 9,989.52, 14,987.88 and 4,288.08 is: 6,433.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,989.52 : 14,987.88 = 4,288.08 : x
  2. Step 2: Convert to fraction form
    9,989.52/14,987.88 = 4,288.08/x
  3. Step 3: Cross multiply
    9,989.52x = 14,987.88 × 4,288.08
  4. Step 4: Simplify right side
    9,989.52x = 64,269,228.47
  5. Step 5: Solve for x
    x = 64,269,228.47/9,989.52
  6. Step 6: Final answer
    x = 6,433.67

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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.