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Finding the Fourth Proportional to 9,008.75, 12,421.05 and 7,409.81

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Solution

The fourth proportional to 9,008.75, 12,421.05 and 7,409.81 is: 10,216.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,008.75 : 12,421.05 = 7,409.81 : x
  2. Step 2: Convert to fraction form
    9,008.75/12,421.05 = 7,409.81/x
  3. Step 3: Cross multiply
    9,008.75x = 12,421.05 × 7,409.81
  4. Step 4: Simplify right side
    9,008.75x = 92,037,623.77
  5. Step 5: Solve for x
    x = 92,037,623.77/9,008.75
  6. Step 6: Final answer
    x = 10,216.47

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Double scale
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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.