Home / 38,931.98-53,722.90-21,930.80

Finding the Fourth Proportional to 38,931.98, 53,722.90 and 21,930.80

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Solution

The fourth proportional to 38,931.98, 53,722.90 and 21,930.80 is: 30,262.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,931.98 : 53,722.90 = 21,930.80 : x
  2. Step 2: Convert to fraction form
    38,931.98/53,722.90 = 21,930.80/x
  3. Step 3: Cross multiply
    38,931.98x = 53,722.90 × 21,930.80
  4. Step 4: Simplify right side
    38,931.98x = 1,178,186,175.32
  5. Step 5: Solve for x
    x = 1,178,186,175.32/38,931.98
  6. Step 6: Final answer
    x = 30,262.68

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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.