Home / 20,695.84-31,038.28-5,905.60

Finding the Fourth Proportional to 20,695.84, 31,038.28 and 5,905.60

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Solution

The fourth proportional to 20,695.84, 31,038.28 and 5,905.60 is: 8,856.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,695.84 : 31,038.28 = 5,905.60 : x
  2. Step 2: Convert to fraction form
    20,695.84/31,038.28 = 5,905.60/x
  3. Step 3: Cross multiply
    20,695.84x = 31,038.28 × 5,905.60
  4. Step 4: Simplify right side
    20,695.84x = 183,299,666.37
  5. Step 5: Solve for x
    x = 183,299,666.37/20,695.84
  6. Step 6: Final answer
    x = 8,856.84

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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.