Home / 21,345.74-29,455.48-12,391.79

Finding the Fourth Proportional to 21,345.74, 29,455.48 and 12,391.79

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Solution

The fourth proportional to 21,345.74, 29,455.48 and 12,391.79 is: 17,099.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,345.74 : 29,455.48 = 12,391.79 : x
  2. Step 2: Convert to fraction form
    21,345.74/29,455.48 = 12,391.79/x
  3. Step 3: Cross multiply
    21,345.74x = 29,455.48 × 12,391.79
  4. Step 4: Simplify right side
    21,345.74x = 365,006,122.51
  5. Step 5: Solve for x
    x = 365,006,122.51/21,345.74
  6. Step 6: Final answer
    x = 17,099.72

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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.