Home / 21,215,999.20-31,823,998.80-13,153,842.40

Finding the Fourth Proportional to 21,215,999.20, 31,823,998.80 and 13,153,842.40

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Solution

The fourth proportional to 21,215,999.20, 31,823,998.80 and 13,153,842.40 is: 19,730,763.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215,999.20 : 31,823,998.80 = 13,153,842.40 : x
  2. Step 2: Convert to fraction form
    21,215,999.20/31,823,998.80 = 13,153,842.40/x
  3. Step 3: Cross multiply
    21,215,999.20x = 31,823,998.80 × 13,153,842.40
  4. Step 4: Simplify right side
    21,215,999.20x = 418,607,864,752,989.12
  5. Step 5: Solve for x
    x = 418,607,864,752,989.12/21,215,999.20
  6. Step 6: Final answer
    x = 19,730,763.60

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1.5x scale

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.