Home / 28,384.16-39,169.79-15,637.08

Finding the Fourth Proportional to 28,384.16, 39,169.79 and 15,637.08

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Solution

The fourth proportional to 28,384.16, 39,169.79 and 15,637.08 is: 21,578.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,384.16 : 39,169.79 = 15,637.08 : x
  2. Step 2: Convert to fraction form
    28,384.16/39,169.79 = 15,637.08/x
  3. Step 3: Cross multiply
    28,384.16x = 39,169.79 × 15,637.08
  4. Step 4: Simplify right side
    28,384.16x = 612,501,355.11
  5. Step 5: Solve for x
    x = 612,501,355.11/28,384.16
  6. Step 6: Final answer
    x = 21,578.99

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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.