Home / 20,795.40-28,689.06-15,117.70

Finding the Fourth Proportional to 20,795.40, 28,689.06 and 15,117.70

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Solution

The fourth proportional to 20,795.40, 28,689.06 and 15,117.70 is: 20,856.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,795.40 : 28,689.06 = 15,117.70 : x
  2. Step 2: Convert to fraction form
    20,795.40/28,689.06 = 15,117.70/x
  3. Step 3: Cross multiply
    20,795.40x = 28,689.06 × 15,117.70
  4. Step 4: Simplify right side
    20,795.40x = 433,712,602.36
  5. Step 5: Solve for x
    x = 433,712,602.36/20,795.40
  6. Step 6: Final answer
    x = 20,856.18

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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.