Home / 20,221,120.80-30,331,681.20-19,181,858.40

Finding the Fourth Proportional to 20,221,120.80, 30,331,681.20 and 19,181,858.40

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Solution

The fourth proportional to 20,221,120.80, 30,331,681.20 and 19,181,858.40 is: 28,772,787.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221,120.80 : 30,331,681.20 = 19,181,858.40 : x
  2. Step 2: Convert to fraction form
    20,221,120.80/30,331,681.20 = 19,181,858.40/x
  3. Step 3: Cross multiply
    20,221,120.80x = 30,331,681.20 × 19,181,858.40
  4. Step 4: Simplify right side
    20,221,120.80x = 581,818,013,812,342
  5. Step 5: Solve for x
    x = 581,818,013,812,342/20,221,120.80
  6. Step 6: Final answer
    x = 28,772,787.60

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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.