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Finding the Fourth Proportional to 18,885.84, 28,332.36 and 10,130.52

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Solution

The fourth proportional to 18,885.84, 28,332.36 and 10,130.52 is: 15,197.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,885.84 : 28,332.36 = 10,130.52 : x
  2. Step 2: Convert to fraction form
    18,885.84/28,332.36 = 10,130.52/x
  3. Step 3: Cross multiply
    18,885.84x = 28,332.36 × 10,130.52
  4. Step 4: Simplify right side
    18,885.84x = 287,021,539.63
  5. Step 5: Solve for x
    x = 287,021,539.63/18,885.84
  6. Step 6: Final answer
    x = 15,197.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.