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Finding the Fourth Proportional to 7,712.51, 11,568.80 and 1,869.11

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Solution

The fourth proportional to 7,712.51, 11,568.80 and 1,869.11 is: 2,803.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,712.51 : 11,568.80 = 1,869.11 : x
  2. Step 2: Convert to fraction form
    7,712.51/11,568.80 = 1,869.11/x
  3. Step 3: Cross multiply
    7,712.51x = 11,568.80 × 1,869.11
  4. Step 4: Simplify right side
    7,712.51x = 21,623,359.77
  5. Step 5: Solve for x
    x = 21,623,359.77/7,712.51
  6. Step 6: Final answer
    x = 2,803.67

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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.