Home / 21,317.40-29,417.40-11,885.76

Finding the Fourth Proportional to 21,317.40, 29,417.40 and 11,885.76

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Solution

The fourth proportional to 21,317.40, 29,417.40 and 11,885.76 is: 16,402.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,317.40 : 29,417.40 = 11,885.76 : x
  2. Step 2: Convert to fraction form
    21,317.40/29,417.40 = 11,885.76/x
  3. Step 3: Cross multiply
    21,317.40x = 29,417.40 × 11,885.76
  4. Step 4: Simplify right side
    21,317.40x = 349,648,156.22
  5. Step 5: Solve for x
    x = 349,648,156.22/21,317.40
  6. Step 6: Final answer
    x = 16,402.01

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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.