Home / 28,031.88-38,685.78-15,457.80

Finding the Fourth Proportional to 28,031.88, 38,685.78 and 15,457.80

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Solution

The fourth proportional to 28,031.88, 38,685.78 and 15,457.80 is: 21,332.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,031.88 : 38,685.78 = 15,457.80 : x
  2. Step 2: Convert to fraction form
    28,031.88/38,685.78 = 15,457.80/x
  3. Step 3: Cross multiply
    28,031.88x = 38,685.78 × 15,457.80
  4. Step 4: Simplify right side
    28,031.88x = 597,997,050.08
  5. Step 5: Solve for x
    x = 597,997,050.08/28,031.88
  6. Step 6: Final answer
    x = 21,332.75

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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.