Home / 15,420.10-21,279.74-8,346.52

Finding the Fourth Proportional to 15,420.10, 21,279.74 and 8,346.52

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Solution

The fourth proportional to 15,420.10, 21,279.74 and 8,346.52 is: 11,518.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.10 : 21,279.74 = 8,346.52 : x
  2. Step 2: Convert to fraction form
    15,420.10/21,279.74 = 8,346.52/x
  3. Step 3: Cross multiply
    15,420.10x = 21,279.74 × 8,346.52
  4. Step 4: Simplify right side
    15,420.10x = 177,611,724.00
  5. Step 5: Solve for x
    x = 177,611,724.00/15,420.10
  6. Step 6: Final answer
    x = 11,518.20

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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.