Home / 15,431.72-21,264.93-10,707.80

Finding the Fourth Proportional to 15,431.72, 21,264.93 and 10,707.80

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Solution

The fourth proportional to 15,431.72, 21,264.93 and 10,707.80 is: 14,755.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,431.72 : 21,264.93 = 10,707.80 : x
  2. Step 2: Convert to fraction form
    15,431.72/21,264.93 = 10,707.80/x
  3. Step 3: Cross multiply
    15,431.72x = 21,264.93 × 10,707.80
  4. Step 4: Simplify right side
    15,431.72x = 227,700,511.13
  5. Step 5: Solve for x
    x = 227,700,511.13/15,431.72
  6. Step 6: Final answer
    x = 14,755.36

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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.