Home / 21,353.23-29,465.21-12,398.98

Finding the Fourth Proportional to 21,353.23, 29,465.21 and 12,398.98

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Solution

The fourth proportional to 21,353.23, 29,465.21 and 12,398.98 is: 17,109.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,353.23 : 29,465.21 = 12,398.98 : x
  2. Step 2: Convert to fraction form
    21,353.23/29,465.21 = 12,398.98/x
  3. Step 3: Cross multiply
    21,353.23x = 29,465.21 × 12,398.98
  4. Step 4: Simplify right side
    21,353.23x = 365,338,549.49
  5. Step 5: Solve for x
    x = 365,338,549.49/21,353.23
  6. Step 6: Final answer
    x = 17,109.29

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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.