Home / 15,420.03-21,279.69-8,346.48

Finding the Fourth Proportional to 15,420.03, 21,279.69 and 8,346.48

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Solution

The fourth proportional to 15,420.03, 21,279.69 and 8,346.48 is: 11,518.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.03 : 21,279.69 = 8,346.48 : x
  2. Step 2: Convert to fraction form
    15,420.03/21,279.69 = 8,346.48/x
  3. Step 3: Cross multiply
    15,420.03x = 21,279.69 × 8,346.48
  4. Step 4: Simplify right side
    15,420.03x = 177,610,506.99
  5. Step 5: Solve for x
    x = 177,610,506.99/15,420.03
  6. Step 6: Final answer
    x = 11,518.17

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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.