Home / 21,282,013.60-31,923,020.40-12,778,957.60

Finding the Fourth Proportional to 21,282,013.60, 31,923,020.40 and 12,778,957.60

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Solution

The fourth proportional to 21,282,013.60, 31,923,020.40 and 12,778,957.60 is: 19,168,436.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,282,013.60 : 31,923,020.40 = 12,778,957.60 : x
  2. Step 2: Convert to fraction form
    21,282,013.60/31,923,020.40 = 12,778,957.60/x
  3. Step 3: Cross multiply
    21,282,013.60x = 31,923,020.40 × 12,778,957.60
  4. Step 4: Simplify right side
    21,282,013.60x = 407,942,924,155,535
  5. Step 5: Solve for x
    x = 407,942,924,155,535/21,282,013.60
  6. Step 6: Final answer
    x = 19,168,436.40

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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.