Home / 21,649.18-29,880.86-12,699.56

Finding the Fourth Proportional to 21,649.18, 29,880.86 and 12,699.56

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Solution

The fourth proportional to 21,649.18, 29,880.86 and 12,699.56 is: 17,528.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,649.18 : 29,880.86 = 12,699.56 : x
  2. Step 2: Convert to fraction form
    21,649.18/29,880.86 = 12,699.56/x
  3. Step 3: Cross multiply
    21,649.18x = 29,880.86 × 12,699.56
  4. Step 4: Simplify right side
    21,649.18x = 379,473,774.42
  5. Step 5: Solve for x
    x = 379,473,774.42/21,649.18
  6. Step 6: Final answer
    x = 17,528.32

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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.