Home / 28,784.34-39,728.91-18,695.21

Finding the Fourth Proportional to 28,784.34, 39,728.91 and 18,695.21

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Solution

The fourth proportional to 28,784.34, 39,728.91 and 18,695.21 is: 25,803.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,784.34 : 39,728.91 = 18,695.21 : x
  2. Step 2: Convert to fraction form
    28,784.34/39,728.91 = 18,695.21/x
  3. Step 3: Cross multiply
    28,784.34x = 39,728.91 × 18,695.21
  4. Step 4: Simplify right side
    28,784.34x = 742,740,029.24
  5. Step 5: Solve for x
    x = 742,740,029.24/28,784.34
  6. Step 6: Final answer
    x = 25,803.62

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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.