Home / 15,430.99-21,293.70-8,716.90

Finding the Fourth Proportional to 15,430.99, 21,293.70 and 8,716.90

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Solution

The fourth proportional to 15,430.99, 21,293.70 and 8,716.90 is: 12,028.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,430.99 : 21,293.70 = 8,716.90 : x
  2. Step 2: Convert to fraction form
    15,430.99/21,293.70 = 8,716.90/x
  3. Step 3: Cross multiply
    15,430.99x = 21,293.70 × 8,716.90
  4. Step 4: Simplify right side
    15,430.99x = 185,615,053.53
  5. Step 5: Solve for x
    x = 185,615,053.53/15,430.99
  6. Step 6: Final answer
    x = 12,028.72

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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.