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Finding the Fourth Proportional to 15,139, 20,894.71 and 10,025.51

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Solution

The fourth proportional to 15,139, 20,894.71 and 10,025.51 is: 13,837.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,139 : 20,894.71 = 10,025.51 : x
  2. Step 2: Convert to fraction form
    15,139/20,894.71 = 10,025.51/x
  3. Step 3: Cross multiply
    15,139x = 20,894.71 × 10,025.51
  4. Step 4: Simplify right side
    15,139x = 209,480,124.05
  5. Step 5: Solve for x
    x = 209,480,124.05/15,139
  6. Step 6: Final answer
    x = 13,837.12

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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.