Home / 21,088.80-31,452.84-20,345.76

Finding the Fourth Proportional to 21,088.80, 31,452.84 and 20,345.76

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Solution

The fourth proportional to 21,088.80, 31,452.84 and 20,345.76 is: 30,344.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,088.80 : 31,452.84 = 20,345.76 : x
  2. Step 2: Convert to fraction form
    21,088.80/31,452.84 = 20,345.76/x
  3. Step 3: Cross multiply
    21,088.80x = 31,452.84 × 20,345.76
  4. Step 4: Simplify right side
    21,088.80x = 639,931,933.96
  5. Step 5: Solve for x
    x = 639,931,933.96/21,088.80
  6. Step 6: Final answer
    x = 30,344.63

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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.