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Finding the Fourth Proportional to 18,307.99, 25,246.16 and 15,664.15

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Solution

The fourth proportional to 18,307.99, 25,246.16 and 15,664.15 is: 21,600.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,307.99 : 25,246.16 = 15,664.15 : x
  2. Step 2: Convert to fraction form
    18,307.99/25,246.16 = 15,664.15/x
  3. Step 3: Cross multiply
    18,307.99x = 25,246.16 × 15,664.15
  4. Step 4: Simplify right side
    18,307.99x = 395,459,510.93
  5. Step 5: Solve for x
    x = 395,459,510.93/18,307.99
  6. Step 6: Final answer
    x = 21,600.38

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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.