Home / 20,819,117.72-28,726,954.88-13,078,678.34

Finding the Fourth Proportional to 20,819,117.72, 28,726,954.88 and 13,078,678.34

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Solution

The fourth proportional to 20,819,117.72, 28,726,954.88 and 13,078,678.34 is: 18,046,422.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819,117.72 : 28,726,954.88 = 13,078,678.34 : x
  2. Step 2: Convert to fraction form
    20,819,117.72/28,726,954.88 = 13,078,678.34/x
  3. Step 3: Cross multiply
    20,819,117.72x = 28,726,954.88 × 13,078,678.34
  4. Step 4: Simplify right side
    20,819,117.72x = 375,710,602,563,213.31
  5. Step 5: Solve for x
    x = 375,710,602,563,213.31/20,819,117.72
  6. Step 6: Final answer
    x = 18,046,422.89

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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.