Home / 21,715.20-29,967.84-13,334.40

Finding the Fourth Proportional to 21,715.20, 29,967.84 and 13,334.40

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Solution

The fourth proportional to 21,715.20, 29,967.84 and 13,334.40 is: 18,402.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,715.20 : 29,967.84 = 13,334.40 : x
  2. Step 2: Convert to fraction form
    21,715.20/29,967.84 = 13,334.40/x
  3. Step 3: Cross multiply
    21,715.20x = 29,967.84 × 13,334.40
  4. Step 4: Simplify right side
    21,715.20x = 399,603,165.70
  5. Step 5: Solve for x
    x = 399,603,165.70/21,715.20
  6. Step 6: Final answer
    x = 18,402.00

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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.