Home / 19,890.65-27,449.16-10,938.71

Finding the Fourth Proportional to 19,890.65, 27,449.16 and 10,938.71

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Solution

The fourth proportional to 19,890.65, 27,449.16 and 10,938.71 is: 15,095.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,890.65 : 27,449.16 = 10,938.71 : x
  2. Step 2: Convert to fraction form
    19,890.65/27,449.16 = 10,938.71/x
  3. Step 3: Cross multiply
    19,890.65x = 27,449.16 × 10,938.71
  4. Step 4: Simplify right side
    19,890.65x = 300,258,400.98
  5. Step 5: Solve for x
    x = 300,258,400.98/19,890.65
  6. Step 6: Final answer
    x = 15,095.45

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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.