Home / 21,530.88-29,709.18-13,031.55

Finding the Fourth Proportional to 21,530.88, 29,709.18 and 13,031.55

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Solution

The fourth proportional to 21,530.88, 29,709.18 and 13,031.55 is: 17,981.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,530.88 : 29,709.18 = 13,031.55 : x
  2. Step 2: Convert to fraction form
    21,530.88/29,709.18 = 13,031.55/x
  3. Step 3: Cross multiply
    21,530.88x = 29,709.18 × 13,031.55
  4. Step 4: Simplify right side
    21,530.88x = 387,156,664.63
  5. Step 5: Solve for x
    x = 387,156,664.63/21,530.88
  6. Step 6: Final answer
    x = 17,981.46

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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.