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Finding the Fourth Proportional to 19,808.15, 29,716.88 and 8,715.74

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Solution

The fourth proportional to 19,808.15, 29,716.88 and 8,715.74 is: 13,075.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,808.15 : 29,716.88 = 8,715.74 : x
  2. Step 2: Convert to fraction form
    19,808.15/29,716.88 = 8,715.74/x
  3. Step 3: Cross multiply
    19,808.15x = 29,716.88 × 8,715.74
  4. Step 4: Simplify right side
    19,808.15x = 259,004,407.53
  5. Step 5: Solve for x
    x = 259,004,407.53/19,808.15
  6. Step 6: Final answer
    x = 13,075.65

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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.