Home / 20,220.13-27,888.93-13,401.82

Finding the Fourth Proportional to 20,220.13, 27,888.93 and 13,401.82

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Solution

The fourth proportional to 20,220.13, 27,888.93 and 13,401.82 is: 18,484.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220.13 : 27,888.93 = 13,401.82 : x
  2. Step 2: Convert to fraction form
    20,220.13/27,888.93 = 13,401.82/x
  3. Step 3: Cross multiply
    20,220.13x = 27,888.93 × 13,401.82
  4. Step 4: Simplify right side
    20,220.13x = 373,762,454.71
  5. Step 5: Solve for x
    x = 373,762,454.71/20,220.13
  6. Step 6: Final answer
    x = 18,484.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.