Home / 12,921.53-19,389.65-6,998.40

Finding the Fourth Proportional to 12,921.53, 19,389.65 and 6,998.40

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Solution

The fourth proportional to 12,921.53, 19,389.65 and 6,998.40 is: 10,501.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,921.53 : 19,389.65 = 6,998.40 : x
  2. Step 2: Convert to fraction form
    12,921.53/19,389.65 = 6,998.40/x
  3. Step 3: Cross multiply
    12,921.53x = 19,389.65 × 6,998.40
  4. Step 4: Simplify right side
    12,921.53x = 135,696,491.57
  5. Step 5: Solve for x
    x = 135,696,491.57/12,921.53
  6. Step 6: Final answer
    x = 10,501.58

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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.