Home / 21,717.76-29,963.64-12,762.40

Finding the Fourth Proportional to 21,717.76, 29,963.64 and 12,762.40

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Solution

The fourth proportional to 21,717.76, 29,963.64 and 12,762.40 is: 17,608.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,717.76 : 29,963.64 = 12,762.40 : x
  2. Step 2: Convert to fraction form
    21,717.76/29,963.64 = 12,762.40/x
  3. Step 3: Cross multiply
    21,717.76x = 29,963.64 × 12,762.40
  4. Step 4: Simplify right side
    21,717.76x = 382,407,959.14
  5. Step 5: Solve for x
    x = 382,407,959.14/21,717.76
  6. Step 6: Final answer
    x = 17,608.08

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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.