Home / 19,017.80-28,538.02-10,139.66

Finding the Fourth Proportional to 19,017.80, 28,538.02 and 10,139.66

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Solution

The fourth proportional to 19,017.80, 28,538.02 and 10,139.66 is: 15,215.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,017.80 : 28,538.02 = 10,139.66 : x
  2. Step 2: Convert to fraction form
    19,017.80/28,538.02 = 10,139.66/x
  3. Step 3: Cross multiply
    19,017.80x = 28,538.02 × 10,139.66
  4. Step 4: Simplify right side
    19,017.80x = 289,365,819.87
  5. Step 5: Solve for x
    x = 289,365,819.87/19,017.80
  6. Step 6: Final answer
    x = 15,215.53

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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.