Home / 21,130,947.20-31,696,420.80-13,017,614.60

Finding the Fourth Proportional to 21,130,947.20, 31,696,420.80 and 13,017,614.60

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Solution

The fourth proportional to 21,130,947.20, 31,696,420.80 and 13,017,614.60 is: 19,526,421.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130,947.20 : 31,696,420.80 = 13,017,614.60 : x
  2. Step 2: Convert to fraction form
    21,130,947.20/31,696,420.80 = 13,017,614.60/x
  3. Step 3: Cross multiply
    21,130,947.20x = 31,696,420.80 × 13,017,614.60
  4. Step 4: Simplify right side
    21,130,947.20x = 412,611,790,173,823.69
  5. Step 5: Solve for x
    x = 412,611,790,173,823.69/21,130,947.20
  6. Step 6: Final answer
    x = 19,526,421.90

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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.