Home / 20,802.29-28,699.11-12,830.67

Finding the Fourth Proportional to 20,802.29, 28,699.11 and 12,830.67

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Solution

The fourth proportional to 20,802.29, 28,699.11 and 12,830.67 is: 17,701.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,802.29 : 28,699.11 = 12,830.67 : x
  2. Step 2: Convert to fraction form
    20,802.29/28,699.11 = 12,830.67/x
  3. Step 3: Cross multiply
    20,802.29x = 28,699.11 × 12,830.67
  4. Step 4: Simplify right side
    20,802.29x = 368,228,809.70
  5. Step 5: Solve for x
    x = 368,228,809.70/20,802.29
  6. Step 6: Final answer
    x = 17,701.36

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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.