Home / 42,778.19-64,174.58-13,190.51

Finding the Fourth Proportional to 42,778.19, 64,174.58 and 13,190.51

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Solution

The fourth proportional to 42,778.19, 64,174.58 and 13,190.51 is: 19,788.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,778.19 : 64,174.58 = 13,190.51 : x
  2. Step 2: Convert to fraction form
    42,778.19/64,174.58 = 13,190.51/x
  3. Step 3: Cross multiply
    42,778.19x = 64,174.58 × 13,190.51
  4. Step 4: Simplify right side
    42,778.19x = 846,495,052.41
  5. Step 5: Solve for x
    x = 846,495,052.41/42,778.19
  6. Step 6: Final answer
    x = 19,788.01

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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.