Home / 21,266.34-29,328.44-13,309.30

Finding the Fourth Proportional to 21,266.34, 29,328.44 and 13,309.30

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Solution

The fourth proportional to 21,266.34, 29,328.44 and 13,309.30 is: 18,354.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,266.34 : 29,328.44 = 13,309.30 : x
  2. Step 2: Convert to fraction form
    21,266.34/29,328.44 = 13,309.30/x
  3. Step 3: Cross multiply
    21,266.34x = 29,328.44 × 13,309.30
  4. Step 4: Simplify right side
    21,266.34x = 390,341,006.49
  5. Step 5: Solve for x
    x = 390,341,006.49/21,266.34
  6. Step 6: Final answer
    x = 18,354.87

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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.