Home / 15,839.79-21,859.59-8,765.74

Finding the Fourth Proportional to 15,839.79, 21,859.59 and 8,765.74

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Solution

The fourth proportional to 15,839.79, 21,859.59 and 8,765.74 is: 12,097.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,839.79 : 21,859.59 = 8,765.74 : x
  2. Step 2: Convert to fraction form
    15,839.79/21,859.59 = 8,765.74/x
  3. Step 3: Cross multiply
    15,839.79x = 21,859.59 × 8,765.74
  4. Step 4: Simplify right side
    15,839.79x = 191,615,482.45
  5. Step 5: Solve for x
    x = 191,615,482.45/15,839.79
  6. Step 6: Final answer
    x = 12,097.10

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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.