Home / 21,014,920.80-31,547,264.40-20,865,621.60

Finding the Fourth Proportional to 21,014,920.80, 31,547,264.40 and 20,865,621.60

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Solution

The fourth proportional to 21,014,920.80, 31,547,264.40 and 20,865,621.60 is: 31,323,138.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,014,920.80 : 31,547,264.40 = 20,865,621.60 : x
  2. Step 2: Convert to fraction form
    21,014,920.80/31,547,264.40 = 20,865,621.60/x
  3. Step 3: Cross multiply
    21,014,920.80x = 31,547,264.40 × 20,865,621.60
  4. Step 4: Simplify right side
    21,014,920.80x = 658,253,281,485,551
  5. Step 5: Solve for x
    x = 658,253,281,485,551/21,014,920.80
  6. Step 6: Final answer
    x = 31,323,138.82

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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.