Home / 20,688.84-31,011.39-10,144.17

Finding the Fourth Proportional to 20,688.84, 31,011.39 and 10,144.17

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Solution

The fourth proportional to 20,688.84, 31,011.39 and 10,144.17 is: 15,205.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.84 : 31,011.39 = 10,144.17 : x
  2. Step 2: Convert to fraction form
    20,688.84/31,011.39 = 10,144.17/x
  3. Step 3: Cross multiply
    20,688.84x = 31,011.39 × 10,144.17
  4. Step 4: Simplify right side
    20,688.84x = 314,584,812.10
  5. Step 5: Solve for x
    x = 314,584,812.10/20,688.84
  6. Step 6: Final answer
    x = 15,205.53

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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.