Home / 28,420.40-39,136.56-19,458.56

Finding the Fourth Proportional to 28,420.40, 39,136.56 and 19,458.56

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Solution

The fourth proportional to 28,420.40, 39,136.56 and 19,458.56 is: 26,795.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,420.40 : 39,136.56 = 19,458.56 : x
  2. Step 2: Convert to fraction form
    28,420.40/39,136.56 = 19,458.56/x
  3. Step 3: Cross multiply
    28,420.40x = 39,136.56 × 19,458.56
  4. Step 4: Simplify right side
    28,420.40x = 761,541,100.95
  5. Step 5: Solve for x
    x = 761,541,100.95/28,420.40
  6. Step 6: Final answer
    x = 26,795.58

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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.