Home / 13,430.72-20,140.86-4,543.67

Finding the Fourth Proportional to 13,430.72, 20,140.86 and 4,543.67

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Solution

The fourth proportional to 13,430.72, 20,140.86 and 4,543.67 is: 6,813.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,430.72 : 20,140.86 = 4,543.67 : x
  2. Step 2: Convert to fraction form
    13,430.72/20,140.86 = 4,543.67/x
  3. Step 3: Cross multiply
    13,430.72x = 20,140.86 × 4,543.67
  4. Step 4: Simplify right side
    13,430.72x = 91,513,471.71
  5. Step 5: Solve for x
    x = 91,513,471.71/13,430.72
  6. Step 6: Final answer
    x = 6,813.74

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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.