Home / 20,285.15-30,430.28-6,960.74

Finding the Fourth Proportional to 20,285.15, 30,430.28 and 6,960.74

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Solution

The fourth proportional to 20,285.15, 30,430.28 and 6,960.74 is: 10,441.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,285.15 : 30,430.28 = 6,960.74 : x
  2. Step 2: Convert to fraction form
    20,285.15/30,430.28 = 6,960.74/x
  3. Step 3: Cross multiply
    20,285.15x = 30,430.28 × 6,960.74
  4. Step 4: Simplify right side
    20,285.15x = 211,817,132.46
  5. Step 5: Solve for x
    x = 211,817,132.46/20,285.15
  6. Step 6: Final answer
    x = 10,441.98

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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.