Home / 21,107.48-29,128.52-11,547.18

Finding the Fourth Proportional to 21,107.48, 29,128.52 and 11,547.18

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Solution

The fourth proportional to 21,107.48, 29,128.52 and 11,547.18 is: 15,935.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,107.48 : 29,128.52 = 11,547.18 : x
  2. Step 2: Convert to fraction form
    21,107.48/29,128.52 = 11,547.18/x
  3. Step 3: Cross multiply
    21,107.48x = 29,128.52 × 11,547.18
  4. Step 4: Simplify right side
    21,107.48x = 336,352,263.57
  5. Step 5: Solve for x
    x = 336,352,263.57/21,107.48
  6. Step 6: Final answer
    x = 15,935.22

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Double scale
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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.