Home / 42,856.16-64,325.79-20,685.11

Finding the Fourth Proportional to 42,856.16, 64,325.79 and 20,685.11

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Solution

The fourth proportional to 42,856.16, 64,325.79 and 20,685.11 is: 31,047.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,856.16 : 64,325.79 = 20,685.11 : x
  2. Step 2: Convert to fraction form
    42,856.16/64,325.79 = 20,685.11/x
  3. Step 3: Cross multiply
    42,856.16x = 64,325.79 × 20,685.11
  4. Step 4: Simplify right side
    42,856.16x = 1,330,586,202.80
  5. Step 5: Solve for x
    x = 1,330,586,202.80/42,856.16
  6. Step 6: Final answer
    x = 31,047.72

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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.