Home / 42,856.14-64,325.78-20,685.12

Finding the Fourth Proportional to 42,856.14, 64,325.78 and 20,685.12

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Solution

The fourth proportional to 42,856.14, 64,325.78 and 20,685.12 is: 31,047.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,856.14 : 64,325.78 = 20,685.12 : x
  2. Step 2: Convert to fraction form
    42,856.14/64,325.78 = 20,685.12/x
  3. Step 3: Cross multiply
    42,856.14x = 64,325.78 × 20,685.12
  4. Step 4: Simplify right side
    42,856.14x = 1,330,586,374.97
  5. Step 5: Solve for x
    x = 1,330,586,374.97/42,856.14
  6. Step 6: Final answer
    x = 31,047.74

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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.