Home / 20,688.16-31,027.20-5,898.40

Finding the Fourth Proportional to 20,688.16, 31,027.20 and 5,898.40

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Solution

The fourth proportional to 20,688.16, 31,027.20 and 5,898.40 is: 8,846.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.16 : 31,027.20 = 5,898.40 : x
  2. Step 2: Convert to fraction form
    20,688.16/31,027.20 = 5,898.40/x
  3. Step 3: Cross multiply
    20,688.16x = 31,027.20 × 5,898.40
  4. Step 4: Simplify right side
    20,688.16x = 183,010,836.48
  5. Step 5: Solve for x
    x = 183,010,836.48/20,688.16
  6. Step 6: Final answer
    x = 8,846.16

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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.