Home / 21,321,178.40-31,960,772.40-10,540,143.20

Finding the Fourth Proportional to 21,321,178.40, 31,960,772.40 and 10,540,143.20

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Solution

The fourth proportional to 21,321,178.40, 31,960,772.40 and 10,540,143.20 is: 15,799,835.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,321,178.40 : 31,960,772.40 = 10,540,143.20 : x
  2. Step 2: Convert to fraction form
    21,321,178.40/31,960,772.40 = 10,540,143.20/x
  3. Step 3: Cross multiply
    21,321,178.40x = 31,960,772.40 × 10,540,143.20
  4. Step 4: Simplify right side
    21,321,178.40x = 336,871,117,878,607.62
  5. Step 5: Solve for x
    x = 336,871,117,878,607.62/21,321,178.40
  6. Step 6: Final answer
    x = 15,799,835.80

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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.