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Finding the Fourth Proportional to 10,890.80, 16,303.80 and 9,724.40

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Solution

The fourth proportional to 10,890.80, 16,303.80 and 9,724.40 is: 14,557.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,890.80 : 16,303.80 = 9,724.40 : x
  2. Step 2: Convert to fraction form
    10,890.80/16,303.80 = 9,724.40/x
  3. Step 3: Cross multiply
    10,890.80x = 16,303.80 × 9,724.40
  4. Step 4: Simplify right side
    10,890.80x = 158,544,672.72
  5. Step 5: Solve for x
    x = 158,544,672.72/10,890.80
  6. Step 6: Final answer
    x = 14,557.67

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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.