Home / 21,031.32-31,451.06-15,698.28

Finding the Fourth Proportional to 21,031.32, 31,451.06 and 15,698.28

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Solution

The fourth proportional to 21,031.32, 31,451.06 and 15,698.28 is: 23,475.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.32 : 31,451.06 = 15,698.28 : x
  2. Step 2: Convert to fraction form
    21,031.32/31,451.06 = 15,698.28/x
  3. Step 3: Cross multiply
    21,031.32x = 31,451.06 × 15,698.28
  4. Step 4: Simplify right side
    21,031.32x = 493,727,703.36
  5. Step 5: Solve for x
    x = 493,727,703.36/21,031.32
  6. Step 6: Final answer
    x = 23,475.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.