Home / 28,291.02-39,042.99-15,715.50

Finding the Fourth Proportional to 28,291.02, 39,042.99 and 15,715.50

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Solution

The fourth proportional to 28,291.02, 39,042.99 and 15,715.50 is: 21,688.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,291.02 : 39,042.99 = 15,715.50 : x
  2. Step 2: Convert to fraction form
    28,291.02/39,042.99 = 15,715.50/x
  3. Step 3: Cross multiply
    28,291.02x = 39,042.99 × 15,715.50
  4. Step 4: Simplify right side
    28,291.02x = 613,580,109.35
  5. Step 5: Solve for x
    x = 613,580,109.35/28,291.02
  6. Step 6: Final answer
    x = 21,688.16

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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.