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Finding the Fourth Proportional to 18,925.98, 26,103.87 and 13,888.50

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Solution

The fourth proportional to 18,925.98, 26,103.87 and 13,888.50 is: 19,155.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,925.98 : 26,103.87 = 13,888.50 : x
  2. Step 2: Convert to fraction form
    18,925.98/26,103.87 = 13,888.50/x
  3. Step 3: Cross multiply
    18,925.98x = 26,103.87 × 13,888.50
  4. Step 4: Simplify right side
    18,925.98x = 362,543,598.50
  5. Step 5: Solve for x
    x = 362,543,598.50/18,925.98
  6. Step 6: Final answer
    x = 19,155.87

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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.