Home / 21,655.76-29,886.37-13,695.08

Finding the Fourth Proportional to 21,655.76, 29,886.37 and 13,695.08

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Solution

The fourth proportional to 21,655.76, 29,886.37 and 13,695.08 is: 18,900.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,655.76 : 29,886.37 = 13,695.08 : x
  2. Step 2: Convert to fraction form
    21,655.76/29,886.37 = 13,695.08/x
  3. Step 3: Cross multiply
    21,655.76x = 29,886.37 × 13,695.08
  4. Step 4: Simplify right side
    21,655.76x = 409,296,044.39
  5. Step 5: Solve for x
    x = 409,296,044.39/21,655.76
  6. Step 6: Final answer
    x = 18,900.11

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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.