Home / 21,109.37-29,129.76-11,547.36

Finding the Fourth Proportional to 21,109.37, 29,129.76 and 11,547.36

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Solution

The fourth proportional to 21,109.37, 29,129.76 and 11,547.36 is: 15,934.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,109.37 : 29,129.76 = 11,547.36 : x
  2. Step 2: Convert to fraction form
    21,109.37/29,129.76 = 11,547.36/x
  3. Step 3: Cross multiply
    21,109.37x = 29,129.76 × 11,547.36
  4. Step 4: Simplify right side
    21,109.37x = 336,371,825.43
  5. Step 5: Solve for x
    x = 336,371,825.43/21,109.37
  6. Step 6: Final answer
    x = 15,934.72

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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.