Home / 20,316.55-30,478.21-6,989.00

Finding the Fourth Proportional to 20,316.55, 30,478.21 and 6,989.00

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Solution

The fourth proportional to 20,316.55, 30,478.21 and 6,989.00 is: 10,484.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,316.55 : 30,478.21 = 6,989.00 : x
  2. Step 2: Convert to fraction form
    20,316.55/30,478.21 = 6,989.00/x
  3. Step 3: Cross multiply
    20,316.55x = 30,478.21 × 6,989.00
  4. Step 4: Simplify right side
    20,316.55x = 213,012,282.93
  5. Step 5: Solve for x
    x = 213,012,282.93/20,316.55
  6. Step 6: Final answer
    x = 10,484.67

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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.