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Finding the Fourth Proportional to 18,721,826.20, 26,286,139.40 and 18,721,826.20

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Solution

The fourth proportional to 18,721,826.20, 26,286,139.40 and 18,721,826.20 is: 26,286,139.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721,826.20 : 26,286,139.40 = 18,721,826.20 : x
  2. Step 2: Convert to fraction form
    18,721,826.20/26,286,139.40 = 18,721,826.20/x
  3. Step 3: Cross multiply
    18,721,826.20x = 26,286,139.40 × 18,721,826.20
  4. Step 4: Simplify right side
    18,721,826.20x = 492,124,533,315,772.25
  5. Step 5: Solve for x
    x = 492,124,533,315,772.25/18,721,826.20
  6. Step 6: Final answer
    x = 26,286,139.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.