Home / 28,343.86-39,168.48-21,257.98

Finding the Fourth Proportional to 28,343.86, 39,168.48 and 21,257.98

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Solution

The fourth proportional to 28,343.86, 39,168.48 and 21,257.98 is: 29,376.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,343.86 : 39,168.48 = 21,257.98 : x
  2. Step 2: Convert to fraction form
    28,343.86/39,168.48 = 21,257.98/x
  3. Step 3: Cross multiply
    28,343.86x = 39,168.48 × 21,257.98
  4. Step 4: Simplify right side
    28,343.86x = 832,642,809.25
  5. Step 5: Solve for x
    x = 832,642,809.25/28,343.86
  6. Step 6: Final answer
    x = 29,376.48

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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.