Home / 10,972.12-15,130.47-8,289.94

Finding the Fourth Proportional to 10,972.12, 15,130.47 and 8,289.94

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Solution

The fourth proportional to 10,972.12, 15,130.47 and 8,289.94 is: 11,431.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,972.12 : 15,130.47 = 8,289.94 : x
  2. Step 2: Convert to fraction form
    10,972.12/15,130.47 = 8,289.94/x
  3. Step 3: Cross multiply
    10,972.12x = 15,130.47 × 8,289.94
  4. Step 4: Simplify right side
    10,972.12x = 125,430,688.47
  5. Step 5: Solve for x
    x = 125,430,688.47/10,972.12
  6. Step 6: Final answer
    x = 11,431.76

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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.