Home / 21,112.24-29,135.28-11,681.68

Finding the Fourth Proportional to 21,112.24, 29,135.28 and 11,681.68

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Solution

The fourth proportional to 21,112.24, 29,135.28 and 11,681.68 is: 16,120.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,112.24 : 29,135.28 = 11,681.68 : x
  2. Step 2: Convert to fraction form
    21,112.24/29,135.28 = 11,681.68/x
  3. Step 3: Cross multiply
    21,112.24x = 29,135.28 × 11,681.68
  4. Step 4: Simplify right side
    21,112.24x = 340,349,017.67
  5. Step 5: Solve for x
    x = 340,349,017.67/21,112.24
  6. Step 6: Final answer
    x = 16,120.93

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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.