Home / 21,031.84-29,019.90-12,648.88

Finding the Fourth Proportional to 21,031.84, 29,019.90 and 12,648.88

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Solution

The fourth proportional to 21,031.84, 29,019.90 and 12,648.88 is: 17,453.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.84 : 29,019.90 = 12,648.88 : x
  2. Step 2: Convert to fraction form
    21,031.84/29,019.90 = 12,648.88/x
  3. Step 3: Cross multiply
    21,031.84x = 29,019.90 × 12,648.88
  4. Step 4: Simplify right side
    21,031.84x = 367,069,232.71
  5. Step 5: Solve for x
    x = 367,069,232.71/21,031.84
  6. Step 6: Final answer
    x = 17,453.03

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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.