Home / 21,319.74-29,421.63-11,887.29

Finding the Fourth Proportional to 21,319.74, 29,421.63 and 11,887.29

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Solution

The fourth proportional to 21,319.74, 29,421.63 and 11,887.29 is: 16,404.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.74 : 29,421.63 = 11,887.29 : x
  2. Step 2: Convert to fraction form
    21,319.74/29,421.63 = 11,887.29/x
  3. Step 3: Cross multiply
    21,319.74x = 29,421.63 × 11,887.29
  4. Step 4: Simplify right side
    21,319.74x = 349,743,448.08
  5. Step 5: Solve for x
    x = 349,743,448.08/21,319.74
  6. Step 6: Final answer
    x = 16,404.68

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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.