Home / 20,557.12-30,806.16-10,156.72

Finding the Fourth Proportional to 20,557.12, 30,806.16 and 10,156.72

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Solution

The fourth proportional to 20,557.12, 30,806.16 and 10,156.72 is: 15,220.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,557.12 : 30,806.16 = 10,156.72 : x
  2. Step 2: Convert to fraction form
    20,557.12/30,806.16 = 10,156.72/x
  3. Step 3: Cross multiply
    20,557.12x = 30,806.16 × 10,156.72
  4. Step 4: Simplify right side
    20,557.12x = 312,889,541.40
  5. Step 5: Solve for x
    x = 312,889,541.40/20,557.12
  6. Step 6: Final answer
    x = 15,220.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.