Home / 28,966,980.76-39,960,620.76-21,109,647.40

Finding the Fourth Proportional to 28,966,980.76, 39,960,620.76 and 21,109,647.40

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Solution

The fourth proportional to 28,966,980.76, 39,960,620.76 and 21,109,647.40 is: 29,121,247.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,966,980.76 : 39,960,620.76 = 21,109,647.40 : x
  2. Step 2: Convert to fraction form
    28,966,980.76/39,960,620.76 = 21,109,647.40/x
  3. Step 3: Cross multiply
    28,966,980.76x = 39,960,620.76 × 21,109,647.40
  4. Step 4: Simplify right side
    28,966,980.76x = 843,554,614,128,719.88
  5. Step 5: Solve for x
    x = 843,554,614,128,719.88/28,966,980.76
  6. Step 6: Final answer
    x = 29,121,247.43

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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.