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Finding the Fourth Proportional to 18,875.99, 28,335.85 and 10,127.99

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Solution

The fourth proportional to 18,875.99, 28,335.85 and 10,127.99 is: 15,203.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,875.99 : 28,335.85 = 10,127.99 : x
  2. Step 2: Convert to fraction form
    18,875.99/28,335.85 = 10,127.99/x
  3. Step 3: Cross multiply
    18,875.99x = 28,335.85 × 10,127.99
  4. Step 4: Simplify right side
    18,875.99x = 286,985,148.54
  5. Step 5: Solve for x
    x = 286,985,148.54/18,875.99
  6. Step 6: Final answer
    x = 15,203.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.