Home / 28,421.40-39,192.48-18,857.94

Finding the Fourth Proportional to 28,421.40, 39,192.48 and 18,857.94

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Solution

The fourth proportional to 28,421.40, 39,192.48 and 18,857.94 is: 26,004.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,421.40 : 39,192.48 = 18,857.94 : x
  2. Step 2: Convert to fraction form
    28,421.40/39,192.48 = 18,857.94/x
  3. Step 3: Cross multiply
    28,421.40x = 39,192.48 × 18,857.94
  4. Step 4: Simplify right side
    28,421.40x = 739,089,436.29
  5. Step 5: Solve for x
    x = 739,089,436.29/28,421.40
  6. Step 6: Final answer
    x = 26,004.68

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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.