Home / 15,430.15-21,293.69-8,356.60

Finding the Fourth Proportional to 15,430.15, 21,293.69 and 8,356.60

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Solution

The fourth proportional to 15,430.15, 21,293.69 and 8,356.60 is: 11,532.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,430.15 : 21,293.69 = 8,356.60 : x
  2. Step 2: Convert to fraction form
    15,430.15/21,293.69 = 8,356.60/x
  3. Step 3: Cross multiply
    15,430.15x = 21,293.69 × 8,356.60
  4. Step 4: Simplify right side
    15,430.15x = 177,942,849.85
  5. Step 5: Solve for x
    x = 177,942,849.85/15,430.15
  6. Step 6: Final answer
    x = 11,532.15

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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.