Home / 19,685.46-27,159.12-12,615.78

Finding the Fourth Proportional to 19,685.46, 27,159.12 and 12,615.78

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Solution

The fourth proportional to 19,685.46, 27,159.12 and 12,615.78 is: 17,405.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,685.46 : 27,159.12 = 12,615.78 : x
  2. Step 2: Convert to fraction form
    19,685.46/27,159.12 = 12,615.78/x
  3. Step 3: Cross multiply
    19,685.46x = 27,159.12 × 12,615.78
  4. Step 4: Simplify right side
    19,685.46x = 342,633,482.91
  5. Step 5: Solve for x
    x = 342,633,482.91/19,685.46
  6. Step 6: Final answer
    x = 17,405.41

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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.