Home / 10,005.79-13,812.81-6,426.09

Finding the Fourth Proportional to 10,005.79, 13,812.81 and 6,426.09

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Solution

The fourth proportional to 10,005.79, 13,812.81 and 6,426.09 is: 8,871.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,005.79 : 13,812.81 = 6,426.09 : x
  2. Step 2: Convert to fraction form
    10,005.79/13,812.81 = 6,426.09/x
  3. Step 3: Cross multiply
    10,005.79x = 13,812.81 × 6,426.09
  4. Step 4: Simplify right side
    10,005.79x = 88,762,372.26
  5. Step 5: Solve for x
    x = 88,762,372.26/10,005.79
  6. Step 6: Final answer
    x = 8,871.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.