Home / 20,710.20-31,085.90-9,619.40

Finding the Fourth Proportional to 20,710.20, 31,085.90 and 9,619.40

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Solution

The fourth proportional to 20,710.20, 31,085.90 and 9,619.40 is: 14,438.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,710.20 : 31,085.90 = 9,619.40 : x
  2. Step 2: Convert to fraction form
    20,710.20/31,085.90 = 9,619.40/x
  3. Step 3: Cross multiply
    20,710.20x = 31,085.90 × 9,619.40
  4. Step 4: Simplify right side
    20,710.20x = 299,027,706.46
  5. Step 5: Solve for x
    x = 299,027,706.46/20,710.20
  6. Step 6: Final answer
    x = 14,438.67

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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.