Home / 38,670.12-53,369.18-21,678.94

Finding the Fourth Proportional to 38,670.12, 53,369.18 and 21,678.94

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Solution

The fourth proportional to 38,670.12, 53,369.18 and 21,678.94 is: 29,919.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,670.12 : 53,369.18 = 21,678.94 : x
  2. Step 2: Convert to fraction form
    38,670.12/53,369.18 = 21,678.94/x
  3. Step 3: Cross multiply
    38,670.12x = 53,369.18 × 21,678.94
  4. Step 4: Simplify right side
    38,670.12x = 1,156,987,251.07
  5. Step 5: Solve for x
    x = 1,156,987,251.07/38,670.12
  6. Step 6: Final answer
    x = 29,919.41

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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.