Home / 20,880.18-31,285.08-10,336.14

Finding the Fourth Proportional to 20,880.18, 31,285.08 and 10,336.14

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Solution

The fourth proportional to 20,880.18, 31,285.08 and 10,336.14 is: 15,486.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.18 : 31,285.08 = 10,336.14 : x
  2. Step 2: Convert to fraction form
    20,880.18/31,285.08 = 10,336.14/x
  3. Step 3: Cross multiply
    20,880.18x = 31,285.08 × 10,336.14
  4. Step 4: Simplify right side
    20,880.18x = 323,366,966.79
  5. Step 5: Solve for x
    x = 323,366,966.79/20,880.18
  6. Step 6: Final answer
    x = 15,486.79

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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.