Home / 15,409.85-21,245.79-12,574.34

Finding the Fourth Proportional to 15,409.85, 21,245.79 and 12,574.34

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Solution

The fourth proportional to 15,409.85, 21,245.79 and 12,574.34 is: 17,336.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,409.85 : 21,245.79 = 12,574.34 : x
  2. Step 2: Convert to fraction form
    15,409.85/21,245.79 = 12,574.34/x
  3. Step 3: Cross multiply
    15,409.85x = 21,245.79 × 12,574.34
  4. Step 4: Simplify right side
    15,409.85x = 267,151,807.63
  5. Step 5: Solve for x
    x = 267,151,807.63/15,409.85
  6. Step 6: Final answer
    x = 17,336.44

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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.