Home / 19,931.10-29,896.65-16,820.70

Finding the Fourth Proportional to 19,931.10, 29,896.65 and 16,820.70

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Solution

The fourth proportional to 19,931.10, 29,896.65 and 16,820.70 is: 25,231.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,931.10 : 29,896.65 = 16,820.70 : x
  2. Step 2: Convert to fraction form
    19,931.10/29,896.65 = 16,820.70/x
  3. Step 3: Cross multiply
    19,931.10x = 29,896.65 × 16,820.70
  4. Step 4: Simplify right side
    19,931.10x = 502,882,580.66
  5. Step 5: Solve for x
    x = 502,882,580.66/19,931.10
  6. Step 6: Final answer
    x = 25,231.05

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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.