Home / 10,289.40-15,435.96-7,854.48

Finding the Fourth Proportional to 10,289.40, 15,435.96 and 7,854.48

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Solution

The fourth proportional to 10,289.40, 15,435.96 and 7,854.48 is: 11,783.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,289.40 : 15,435.96 = 7,854.48 : x
  2. Step 2: Convert to fraction form
    10,289.40/15,435.96 = 7,854.48/x
  3. Step 3: Cross multiply
    10,289.40x = 15,435.96 × 7,854.48
  4. Step 4: Simplify right side
    10,289.40x = 121,241,439.10
  5. Step 5: Solve for x
    x = 121,241,439.10/10,289.40
  6. Step 6: Final answer
    x = 11,783.14

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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.