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Finding the Fourth Proportional to 7,810.19, 11,715.48 and 1,966.89

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Solution

The fourth proportional to 7,810.19, 11,715.48 and 1,966.89 is: 2,950.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,810.19 : 11,715.48 = 1,966.89 : x
  2. Step 2: Convert to fraction form
    7,810.19/11,715.48 = 1,966.89/x
  3. Step 3: Cross multiply
    7,810.19x = 11,715.48 × 1,966.89
  4. Step 4: Simplify right side
    7,810.19x = 23,043,060.46
  5. Step 5: Solve for x
    x = 23,043,060.46/7,810.19
  6. Step 6: Final answer
    x = 2,950.39

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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.