Home / 28,758.78-39,653.16-19,688.49

Finding the Fourth Proportional to 28,758.78, 39,653.16 and 19,688.49

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Solution

The fourth proportional to 28,758.78, 39,653.16 and 19,688.49 is: 27,146.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,758.78 : 39,653.16 = 19,688.49 : x
  2. Step 2: Convert to fraction form
    28,758.78/39,653.16 = 19,688.49/x
  3. Step 3: Cross multiply
    28,758.78x = 39,653.16 × 19,688.49
  4. Step 4: Simplify right side
    28,758.78x = 780,710,844.13
  5. Step 5: Solve for x
    x = 780,710,844.13/28,758.78
  6. Step 6: Final answer
    x = 27,146.87

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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.