Home / 21,038.40-29,031.48-12,086.28

Finding the Fourth Proportional to 21,038.40, 29,031.48 and 12,086.28

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Solution

The fourth proportional to 21,038.40, 29,031.48 and 12,086.28 is: 16,678.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,038.40 : 29,031.48 = 12,086.28 : x
  2. Step 2: Convert to fraction form
    21,038.40/29,031.48 = 12,086.28/x
  3. Step 3: Cross multiply
    21,038.40x = 29,031.48 × 12,086.28
  4. Step 4: Simplify right side
    21,038.40x = 350,882,596.09
  5. Step 5: Solve for x
    x = 350,882,596.09/21,038.40
  6. Step 6: Final answer
    x = 16,678.20

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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.