Home / 19,890.39-27,448.85-10,938.47

Finding the Fourth Proportional to 19,890.39, 27,448.85 and 10,938.47

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Solution

The fourth proportional to 19,890.39, 27,448.85 and 10,938.47 is: 15,095.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,890.39 : 27,448.85 = 10,938.47 : x
  2. Step 2: Convert to fraction form
    19,890.39/27,448.85 = 10,938.47/x
  3. Step 3: Cross multiply
    19,890.39x = 27,448.85 × 10,938.47
  4. Step 4: Simplify right side
    19,890.39x = 300,248,230.32
  5. Step 5: Solve for x
    x = 300,248,230.32/19,890.39
  6. Step 6: Final answer
    x = 15,095.14

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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.