Home / 13,185,621.20-19,778,431.80-7,800,352.40

Finding the Fourth Proportional to 13,185,621.20, 19,778,431.80 and 7,800,352.40

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Solution

The fourth proportional to 13,185,621.20, 19,778,431.80 and 7,800,352.40 is: 11,700,528.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,185,621.20 : 19,778,431.80 = 7,800,352.40 : x
  2. Step 2: Convert to fraction form
    13,185,621.20/19,778,431.80 = 7,800,352.40/x
  3. Step 3: Cross multiply
    13,185,621.20x = 19,778,431.80 × 7,800,352.40
  4. Step 4: Simplify right side
    13,185,621.20x = 154,278,737,959,366.34
  5. Step 5: Solve for x
    x = 154,278,737,959,366.34/13,185,621.20
  6. Step 6: Final answer
    x = 11,700,528.60

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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.