Home / 21,155.18-29,192.09-12,655.58

Finding the Fourth Proportional to 21,155.18, 29,192.09 and 12,655.58

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Solution

The fourth proportional to 21,155.18, 29,192.09 and 12,655.58 is: 17,463.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.18 : 29,192.09 = 12,655.58 : x
  2. Step 2: Convert to fraction form
    21,155.18/29,192.09 = 12,655.58/x
  3. Step 3: Cross multiply
    21,155.18x = 29,192.09 × 12,655.58
  4. Step 4: Simplify right side
    21,155.18x = 369,442,621.12
  5. Step 5: Solve for x
    x = 369,442,621.12/21,155.18
  6. Step 6: Final answer
    x = 17,463.46

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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.