Home / 28,637.04-39,518.76-15,890.22

Finding the Fourth Proportional to 28,637.04, 39,518.76 and 15,890.22

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Solution

The fourth proportional to 28,637.04, 39,518.76 and 15,890.22 is: 21,928.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,637.04 : 39,518.76 = 15,890.22 : x
  2. Step 2: Convert to fraction form
    28,637.04/39,518.76 = 15,890.22/x
  3. Step 3: Cross multiply
    28,637.04x = 39,518.76 × 15,890.22
  4. Step 4: Simplify right side
    28,637.04x = 627,961,790.53
  5. Step 5: Solve for x
    x = 627,961,790.53/28,637.04
  6. Step 6: Final answer
    x = 21,928.31

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Double scale
Find fourth proportional to 28,638.04, 39,520.14 and 15,891.22
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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.