Home / 19,810.47-27,338.66-10,857.78

Finding the Fourth Proportional to 19,810.47, 27,338.66 and 10,857.78

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Solution

The fourth proportional to 19,810.47, 27,338.66 and 10,857.78 is: 14,983.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,810.47 : 27,338.66 = 10,857.78 : x
  2. Step 2: Convert to fraction form
    19,810.47/27,338.66 = 10,857.78/x
  3. Step 3: Cross multiply
    19,810.47x = 27,338.66 × 10,857.78
  4. Step 4: Simplify right side
    19,810.47x = 296,837,155.77
  5. Step 5: Solve for x
    x = 296,837,155.77/19,810.47
  6. Step 6: Final answer
    x = 14,983.85

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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.