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Finding the Fourth Proportional to 39,802.81, 54,928.24 and 21,653.93

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Solution

The fourth proportional to 39,802.81, 54,928.24 and 21,653.93 is: 29,882.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,802.81 : 54,928.24 = 21,653.93 : x
  2. Step 2: Convert to fraction form
    39,802.81/54,928.24 = 21,653.93/x
  3. Step 3: Cross multiply
    39,802.81x = 54,928.24 × 21,653.93
  4. Step 4: Simplify right side
    39,802.81x = 1,189,412,347.17
  5. Step 5: Solve for x
    x = 1,189,412,347.17/39,802.81
  6. Step 6: Final answer
    x = 29,882.62

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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.