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Finding the Fourth Proportional to 14,357.55, 19,808.84 and 8,690.49

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Solution

The fourth proportional to 14,357.55, 19,808.84 and 8,690.49 is: 11,990.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,357.55 : 19,808.84 = 8,690.49 : x
  2. Step 2: Convert to fraction form
    14,357.55/19,808.84 = 8,690.49/x
  3. Step 3: Cross multiply
    14,357.55x = 19,808.84 × 8,690.49
  4. Step 4: Simplify right side
    14,357.55x = 172,148,482.48
  5. Step 5: Solve for x
    x = 172,148,482.48/14,357.55
  6. Step 6: Final answer
    x = 11,990.10

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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.