Home / 18,685,920.80-28,025,425.20-5,219,962.40

Finding the Fourth Proportional to 18,685,920.80, 28,025,425.20 and 5,219,962.40

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Solution

The fourth proportional to 18,685,920.80, 28,025,425.20 and 5,219,962.40 is: 7,828,978.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,685,920.80 : 28,025,425.20 = 5,219,962.40 : x
  2. Step 2: Convert to fraction form
    18,685,920.80/28,025,425.20 = 5,219,962.40/x
  3. Step 3: Cross multiply
    18,685,920.80x = 28,025,425.20 × 5,219,962.40
  4. Step 4: Simplify right side
    18,685,920.80x = 146,291,665,788,012.50
  5. Step 5: Solve for x
    x = 146,291,665,788,012.50/18,685,920.80
  6. Step 6: Final answer
    x = 7,828,978.16

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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.