Home / 30,956.56-42,720.90-18,210.64

Finding the Fourth Proportional to 30,956.56, 42,720.90 and 18,210.64

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Solution

The fourth proportional to 30,956.56, 42,720.90 and 18,210.64 is: 25,131.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,956.56 : 42,720.90 = 18,210.64 : x
  2. Step 2: Convert to fraction form
    30,956.56/42,720.90 = 18,210.64/x
  3. Step 3: Cross multiply
    30,956.56x = 42,720.90 × 18,210.64
  4. Step 4: Simplify right side
    30,956.56x = 777,974,930.38
  5. Step 5: Solve for x
    x = 777,974,930.38/30,956.56
  6. Step 6: Final answer
    x = 25,131.18

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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.