Home / 15,189,005.76-20,960,880.87-8,219,681.58

Finding the Fourth Proportional to 15,189,005.76, 20,960,880.87 and 8,219,681.58

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Solution

The fourth proportional to 15,189,005.76, 20,960,880.87 and 8,219,681.58 is: 11,343,189.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,189,005.76 : 20,960,880.87 = 8,219,681.58 : x
  2. Step 2: Convert to fraction form
    15,189,005.76/20,960,880.87 = 8,219,681.58/x
  3. Step 3: Cross multiply
    15,189,005.76x = 20,960,880.87 × 8,219,681.58
  4. Step 4: Simplify right side
    15,189,005.76x = 172,291,766,282,908.97
  5. Step 5: Solve for x
    x = 172,291,766,282,908.97/15,189,005.76
  6. Step 6: Final answer
    x = 11,343,189.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.