Home / 10,905.58-15,047.88-6,428.71

Finding the Fourth Proportional to 10,905.58, 15,047.88 and 6,428.71

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Solution

The fourth proportional to 10,905.58, 15,047.88 and 6,428.71 is: 8,870.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,905.58 : 15,047.88 = 6,428.71 : x
  2. Step 2: Convert to fraction form
    10,905.58/15,047.88 = 6,428.71/x
  3. Step 3: Cross multiply
    10,905.58x = 15,047.88 × 6,428.71
  4. Step 4: Simplify right side
    10,905.58x = 96,738,381.40
  5. Step 5: Solve for x
    x = 96,738,381.40/10,905.58
  6. Step 6: Final answer
    x = 8,870.54

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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.