Home / 21,331,152.80-31,996,729.20-12,807,101.60

Finding the Fourth Proportional to 21,331,152.80, 31,996,729.20 and 12,807,101.60

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Solution

The fourth proportional to 21,331,152.80, 31,996,729.20 and 12,807,101.60 is: 19,210,652.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,331,152.80 : 31,996,729.20 = 12,807,101.60 : x
  2. Step 2: Convert to fraction form
    21,331,152.80/31,996,729.20 = 12,807,101.60/x
  3. Step 3: Cross multiply
    21,331,152.80x = 31,996,729.20 × 12,807,101.60
  4. Step 4: Simplify right side
    21,331,152.80x = 409,785,361,732,086.69
  5. Step 5: Solve for x
    x = 409,785,361,732,086.69/21,331,152.80
  6. Step 6: Final answer
    x = 19,210,652.40

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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.