Home / 42,778.60-64,124.70-19,421.80

Finding the Fourth Proportional to 42,778.60, 64,124.70 and 19,421.80

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Solution

The fourth proportional to 42,778.60, 64,124.70 and 19,421.80 is: 29,113.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,778.60 : 64,124.70 = 19,421.80 : x
  2. Step 2: Convert to fraction form
    42,778.60/64,124.70 = 19,421.80/x
  3. Step 3: Cross multiply
    42,778.60x = 64,124.70 × 19,421.80
  4. Step 4: Simplify right side
    42,778.60x = 1,245,417,098.46
  5. Step 5: Solve for x
    x = 1,245,417,098.46/42,778.60
  6. Step 6: Final answer
    x = 29,113.09

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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.