Home / 21,128,015.52-31,703,798.52-11,412,432.72

Finding the Fourth Proportional to 21,128,015.52, 31,703,798.52 and 11,412,432.72

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Solution

The fourth proportional to 21,128,015.52, 31,703,798.52 and 11,412,432.72 is: 17,125,009.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,128,015.52 : 31,703,798.52 = 11,412,432.72 : x
  2. Step 2: Convert to fraction form
    21,128,015.52/31,703,798.52 = 11,412,432.72/x
  3. Step 3: Cross multiply
    21,128,015.52x = 31,703,798.52 × 11,412,432.72
  4. Step 4: Simplify right side
    21,128,015.52x = 361,817,467,577,935.56
  5. Step 5: Solve for x
    x = 361,817,467,577,935.56/21,128,015.52
  6. Step 6: Final answer
    x = 17,125,009.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.