Home / 21,274.32-31,750.66-20,721.36

Finding the Fourth Proportional to 21,274.32, 31,750.66 and 20,721.36

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Solution

The fourth proportional to 21,274.32, 31,750.66 and 20,721.36 is: 30,925.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,274.32 : 31,750.66 = 20,721.36 : x
  2. Step 2: Convert to fraction form
    21,274.32/31,750.66 = 20,721.36/x
  3. Step 3: Cross multiply
    21,274.32x = 31,750.66 × 20,721.36
  4. Step 4: Simplify right side
    21,274.32x = 657,916,856.10
  5. Step 5: Solve for x
    x = 657,916,856.10/21,274.32
  6. Step 6: Final answer
    x = 30,925.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.