Home / 21,079.06-29,102.66-13,528.64

Finding the Fourth Proportional to 21,079.06, 29,102.66 and 13,528.64

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Solution

The fourth proportional to 21,079.06, 29,102.66 and 13,528.64 is: 18,678.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,079.06 : 29,102.66 = 13,528.64 : x
  2. Step 2: Convert to fraction form
    21,079.06/29,102.66 = 13,528.64/x
  3. Step 3: Cross multiply
    21,079.06x = 29,102.66 × 13,528.64
  4. Step 4: Simplify right side
    21,079.06x = 393,719,516.76
  5. Step 5: Solve for x
    x = 393,719,516.76/21,079.06
  6. Step 6: Final answer
    x = 18,678.23

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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.