Home / 42,790.71-64,189.13-13,204.70

Finding the Fourth Proportional to 42,790.71, 64,189.13 and 13,204.70

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Solution

The fourth proportional to 42,790.71, 64,189.13 and 13,204.70 is: 19,807.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,790.71 : 64,189.13 = 13,204.70 : x
  2. Step 2: Convert to fraction form
    42,790.71/64,189.13 = 13,204.70/x
  3. Step 3: Cross multiply
    42,790.71x = 64,189.13 × 13,204.70
  4. Step 4: Simplify right side
    42,790.71x = 847,597,989.53
  5. Step 5: Solve for x
    x = 847,597,989.53/42,790.71
  6. Step 6: Final answer
    x = 19,807.99

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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.