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Finding the Fourth Proportional to 14,482.60, 19,990.50 and 11,503.72

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Solution

The fourth proportional to 14,482.60, 19,990.50 and 11,503.72 is: 15,878.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,482.60 : 19,990.50 = 11,503.72 : x
  2. Step 2: Convert to fraction form
    14,482.60/19,990.50 = 11,503.72/x
  3. Step 3: Cross multiply
    14,482.60x = 19,990.50 × 11,503.72
  4. Step 4: Simplify right side
    14,482.60x = 229,965,114.66
  5. Step 5: Solve for x
    x = 229,965,114.66/14,482.60
  6. Step 6: Final answer
    x = 15,878.72

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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.