Home / 21,411.54-29,547.99-11,980.08

Finding the Fourth Proportional to 21,411.54, 29,547.99 and 11,980.08

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Solution

The fourth proportional to 21,411.54, 29,547.99 and 11,980.08 is: 16,532.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,411.54 : 29,547.99 = 11,980.08 : x
  2. Step 2: Convert to fraction form
    21,411.54/29,547.99 = 11,980.08/x
  3. Step 3: Cross multiply
    21,411.54x = 29,547.99 × 11,980.08
  4. Step 4: Simplify right side
    21,411.54x = 353,987,284.04
  5. Step 5: Solve for x
    x = 353,987,284.04/21,411.54
  6. Step 6: Final answer
    x = 16,532.55

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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.