Home / 42,856.23-64,325.81-20,685.21

Finding the Fourth Proportional to 42,856.23, 64,325.81 and 20,685.21

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Solution

The fourth proportional to 42,856.23, 64,325.81 and 20,685.21 is: 31,047.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,856.23 : 64,325.81 = 20,685.21 : x
  2. Step 2: Convert to fraction form
    42,856.23/64,325.81 = 20,685.21/x
  3. Step 3: Cross multiply
    42,856.23x = 64,325.81 × 20,685.21
  4. Step 4: Simplify right side
    42,856.23x = 1,330,592,784.84
  5. Step 5: Solve for x
    x = 1,330,592,784.84/42,856.23
  6. Step 6: Final answer
    x = 31,047.83

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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.