Home / 8,275,031.80-12,421,878.90-6,390,129.40

Finding the Fourth Proportional to 8,275,031.80, 12,421,878.90 and 6,390,129.40

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Solution

The fourth proportional to 8,275,031.80, 12,421,878.90 and 6,390,129.40 is: 9,592,399.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,275,031.80 : 12,421,878.90 = 6,390,129.40 : x
  2. Step 2: Convert to fraction form
    8,275,031.80/12,421,878.90 = 6,390,129.40/x
  3. Step 3: Cross multiply
    8,275,031.80x = 12,421,878.90 × 6,390,129.40
  4. Step 4: Simplify right side
    8,275,031.80x = 79,377,413,562,129.67
  5. Step 5: Solve for x
    x = 79,377,413,562,129.67/8,275,031.80
  6. Step 6: Final answer
    x = 9,592,399.82

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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.