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Finding the Fourth Proportional to 18,750.99, 25,840.59 and 13,436.58

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Solution

The fourth proportional to 18,750.99, 25,840.59 and 13,436.58 is: 18,516.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,750.99 : 25,840.59 = 13,436.58 : x
  2. Step 2: Convert to fraction form
    18,750.99/25,840.59 = 13,436.58/x
  3. Step 3: Cross multiply
    18,750.99x = 25,840.59 × 13,436.58
  4. Step 4: Simplify right side
    18,750.99x = 347,209,154.78
  5. Step 5: Solve for x
    x = 347,209,154.78/18,750.99
  6. Step 6: Final answer
    x = 18,516.84

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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.