Home / 8,472.21-11,688.85-5,113.75

Finding the Fourth Proportional to 8,472.21, 11,688.85 and 5,113.75

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Solution

The fourth proportional to 8,472.21, 11,688.85 and 5,113.75 is: 7,055.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,472.21 : 11,688.85 = 5,113.75 : x
  2. Step 2: Convert to fraction form
    8,472.21/11,688.85 = 5,113.75/x
  3. Step 3: Cross multiply
    8,472.21x = 11,688.85 × 5,113.75
  4. Step 4: Simplify right side
    8,472.21x = 59,773,800.07
  5. Step 5: Solve for x
    x = 59,773,800.07/8,472.21
  6. Step 6: Final answer
    x = 7,055.28

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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.