Home / 15,416.88-21,319.03-14,720.68

Finding the Fourth Proportional to 15,416.88, 21,319.03 and 14,720.68

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Solution

The fourth proportional to 15,416.88, 21,319.03 and 14,720.68 is: 20,356.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,416.88 : 21,319.03 = 14,720.68 : x
  2. Step 2: Convert to fraction form
    15,416.88/21,319.03 = 14,720.68/x
  3. Step 3: Cross multiply
    15,416.88x = 21,319.03 × 14,720.68
  4. Step 4: Simplify right side
    15,416.88x = 313,830,618.54
  5. Step 5: Solve for x
    x = 313,830,618.54/15,416.88
  6. Step 6: Final answer
    x = 20,356.30

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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.