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Finding the Fourth Proportional to 18,878.13, 28,339.08 and 10,130.13

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Solution

The fourth proportional to 18,878.13, 28,339.08 and 10,130.13 is: 15,206.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,878.13 : 28,339.08 = 10,130.13 : x
  2. Step 2: Convert to fraction form
    18,878.13/28,339.08 = 10,130.13/x
  3. Step 3: Cross multiply
    18,878.13x = 28,339.08 × 10,130.13
  4. Step 4: Simplify right side
    18,878.13x = 287,078,564.48
  5. Step 5: Solve for x
    x = 287,078,564.48/18,878.13
  6. Step 6: Final answer
    x = 15,206.94

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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.