Home / 10,389.79-14,353.59-6,813.28

Finding the Fourth Proportional to 10,389.79, 14,353.59 and 6,813.28

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Solution

The fourth proportional to 10,389.79, 14,353.59 and 6,813.28 is: 9,412.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,389.79 : 14,353.59 = 6,813.28 : x
  2. Step 2: Convert to fraction form
    10,389.79/14,353.59 = 6,813.28/x
  3. Step 3: Cross multiply
    10,389.79x = 14,353.59 × 6,813.28
  4. Step 4: Simplify right side
    10,389.79x = 97,795,027.68
  5. Step 5: Solve for x
    x = 97,795,027.68/10,389.79
  6. Step 6: Final answer
    x = 9,412.61

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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.