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Finding the Fourth Proportional to 38,924.40, 53,717.16 and 21,935.40

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Solution

The fourth proportional to 38,924.40, 53,717.16 and 21,935.40 is: 30,271.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,924.40 : 53,717.16 = 21,935.40 : x
  2. Step 2: Convert to fraction form
    38,924.40/53,717.16 = 21,935.40/x
  3. Step 3: Cross multiply
    38,924.40x = 53,717.16 × 21,935.40
  4. Step 4: Simplify right side
    38,924.40x = 1,178,307,391.46
  5. Step 5: Solve for x
    x = 1,178,307,391.46/38,924.40
  6. Step 6: Final answer
    x = 30,271.69

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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.