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Finding the Fourth Proportional to 18,750.40, 25,878.72 and 14,266.96

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Solution

The fourth proportional to 18,750.40, 25,878.72 and 14,266.96 is: 19,690.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,750.40 : 25,878.72 = 14,266.96 : x
  2. Step 2: Convert to fraction form
    18,750.40/25,878.72 = 14,266.96/x
  3. Step 3: Cross multiply
    18,750.40x = 25,878.72 × 14,266.96
  4. Step 4: Simplify right side
    18,750.40x = 369,210,663.09
  5. Step 5: Solve for x
    x = 369,210,663.09/18,750.40
  6. Step 6: Final answer
    x = 19,690.82

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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.