Home / 19,155.06-28,707.65-10,721.21

Finding the Fourth Proportional to 19,155.06, 28,707.65 and 10,721.21

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Solution

The fourth proportional to 19,155.06, 28,707.65 and 10,721.21 is: 16,067.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,155.06 : 28,707.65 = 10,721.21 : x
  2. Step 2: Convert to fraction form
    19,155.06/28,707.65 = 10,721.21/x
  3. Step 3: Cross multiply
    19,155.06x = 28,707.65 × 10,721.21
  4. Step 4: Simplify right side
    19,155.06x = 307,780,547.11
  5. Step 5: Solve for x
    x = 307,780,547.11/19,155.06
  6. Step 6: Final answer
    x = 16,067.85

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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.