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Finding the Fourth Proportional to 19,428,005.20, 27,239,020.40 and 19,428,005.20

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Solution

The fourth proportional to 19,428,005.20, 27,239,020.40 and 19,428,005.20 is: 27,239,020.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,428,005.20 : 27,239,020.40 = 19,428,005.20 : x
  2. Step 2: Convert to fraction form
    19,428,005.20/27,239,020.40 = 19,428,005.20/x
  3. Step 3: Cross multiply
    19,428,005.20x = 27,239,020.40 × 19,428,005.20
  4. Step 4: Simplify right side
    19,428,005.20x = 529,199,829,974,106
  5. Step 5: Solve for x
    x = 529,199,829,974,106/19,428,005.20
  6. Step 6: Final answer
    x = 27,239,020.40

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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.