Home / 28,970.42-39,991.41-18,907.47

Finding the Fourth Proportional to 28,970.42, 39,991.41 and 18,907.47

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Solution

The fourth proportional to 28,970.42, 39,991.41 and 18,907.47 is: 26,100.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,970.42 : 39,991.41 = 18,907.47 : x
  2. Step 2: Convert to fraction form
    28,970.42/39,991.41 = 18,907.47/x
  3. Step 3: Cross multiply
    28,970.42x = 39,991.41 × 18,907.47
  4. Step 4: Simplify right side
    28,970.42x = 756,136,384.83
  5. Step 5: Solve for x
    x = 756,136,384.83/28,970.42
  6. Step 6: Final answer
    x = 26,100.30

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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.