Home / 28,389.18-39,175.51-15,641.91

Finding the Fourth Proportional to 28,389.18, 39,175.51 and 15,641.91

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Solution

The fourth proportional to 28,389.18, 39,175.51 and 15,641.91 is: 21,584.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,389.18 : 39,175.51 = 15,641.91 : x
  2. Step 2: Convert to fraction form
    28,389.18/39,175.51 = 15,641.91/x
  3. Step 3: Cross multiply
    28,389.18x = 39,175.51 × 15,641.91
  4. Step 4: Simplify right side
    28,389.18x = 612,779,801.62
  5. Step 5: Solve for x
    x = 612,779,801.62/28,389.18
  6. Step 6: Final answer
    x = 21,584.98

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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.