Home / 10,543.47-15,782.39-6,639.67

Finding the Fourth Proportional to 10,543.47, 15,782.39 and 6,639.67

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Solution

The fourth proportional to 10,543.47, 15,782.39 and 6,639.67 is: 9,938.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,543.47 : 15,782.39 = 6,639.67 : x
  2. Step 2: Convert to fraction form
    10,543.47/15,782.39 = 6,639.67/x
  3. Step 3: Cross multiply
    10,543.47x = 15,782.39 × 6,639.67
  4. Step 4: Simplify right side
    10,543.47x = 104,789,861.41
  5. Step 5: Solve for x
    x = 104,789,861.41/10,543.47
  6. Step 6: Final answer
    x = 9,938.84

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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.