Home / 20,127.69-27,730.52-15,574.72

Finding the Fourth Proportional to 20,127.69, 27,730.52 and 15,574.72

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Solution

The fourth proportional to 20,127.69, 27,730.52 and 15,574.72 is: 21,457.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,127.69 : 27,730.52 = 15,574.72 : x
  2. Step 2: Convert to fraction form
    20,127.69/27,730.52 = 15,574.72/x
  3. Step 3: Cross multiply
    20,127.69x = 27,730.52 × 15,574.72
  4. Step 4: Simplify right side
    20,127.69x = 431,895,013.47
  5. Step 5: Solve for x
    x = 431,895,013.47/20,127.69
  6. Step 6: Final answer
    x = 21,457.75

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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.