Home / 15,430.91-21,294.56-8,716.21

Finding the Fourth Proportional to 15,430.91, 21,294.56 and 8,716.21

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Solution

The fourth proportional to 15,430.91, 21,294.56 and 8,716.21 is: 12,028.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,430.91 : 21,294.56 = 8,716.21 : x
  2. Step 2: Convert to fraction form
    15,430.91/21,294.56 = 8,716.21/x
  3. Step 3: Cross multiply
    15,430.91x = 21,294.56 × 8,716.21
  4. Step 4: Simplify right side
    15,430.91x = 185,607,825.37
  5. Step 5: Solve for x
    x = 185,607,825.37/15,430.91
  6. Step 6: Final answer
    x = 12,028.32

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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.