Home / 21,390.75-29,518.02-11,830.07

Finding the Fourth Proportional to 21,390.75, 29,518.02 and 11,830.07

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Solution

The fourth proportional to 21,390.75, 29,518.02 and 11,830.07 is: 16,324.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.75 : 29,518.02 = 11,830.07 : x
  2. Step 2: Convert to fraction form
    21,390.75/29,518.02 = 11,830.07/x
  3. Step 3: Cross multiply
    21,390.75x = 29,518.02 × 11,830.07
  4. Step 4: Simplify right side
    21,390.75x = 349,200,095.27
  5. Step 5: Solve for x
    x = 349,200,095.27/21,390.75
  6. Step 6: Final answer
    x = 16,324.82

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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.