Home / 15,407.46-21,191.76-12,699.63

Finding the Fourth Proportional to 15,407.46, 21,191.76 and 12,699.63

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Solution

The fourth proportional to 15,407.46, 21,191.76 and 12,699.63 is: 17,467.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,407.46 : 21,191.76 = 12,699.63 : x
  2. Step 2: Convert to fraction form
    15,407.46/21,191.76 = 12,699.63/x
  3. Step 3: Cross multiply
    15,407.46x = 21,191.76 × 12,699.63
  4. Step 4: Simplify right side
    15,407.46x = 269,127,511.05
  5. Step 5: Solve for x
    x = 269,127,511.05/15,407.46
  6. Step 6: Final answer
    x = 17,467.35

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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.