Home / 21,038.34-29,028.87-12,655.38

Finding the Fourth Proportional to 21,038.34, 29,028.87 and 12,655.38

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Solution

The fourth proportional to 21,038.34, 29,028.87 and 12,655.38 is: 17,461.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,038.34 : 29,028.87 = 12,655.38 : x
  2. Step 2: Convert to fraction form
    21,038.34/29,028.87 = 12,655.38/x
  3. Step 3: Cross multiply
    21,038.34x = 29,028.87 × 12,655.38
  4. Step 4: Simplify right side
    21,038.34x = 367,371,380.82
  5. Step 5: Solve for x
    x = 367,371,380.82/21,038.34
  6. Step 6: Final answer
    x = 17,461.99

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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.