Home / 21,282,015.60-31,923,023.40-12,778,959.60

Finding the Fourth Proportional to 21,282,015.60, 31,923,023.40 and 12,778,959.60

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Solution

The fourth proportional to 21,282,015.60, 31,923,023.40 and 12,778,959.60 is: 19,168,439.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,282,015.60 : 31,923,023.40 = 12,778,959.60 : x
  2. Step 2: Convert to fraction form
    21,282,015.60/31,923,023.40 = 12,778,959.60/x
  3. Step 3: Cross multiply
    21,282,015.60x = 31,923,023.40 × 12,778,959.60
  4. Step 4: Simplify right side
    21,282,015.60x = 407,943,026,338,454.62
  5. Step 5: Solve for x
    x = 407,943,026,338,454.62/21,282,015.60
  6. Step 6: Final answer
    x = 19,168,439.40

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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.