Home / 20,686,623.10-28,547,538.48-11,989,840.21

Finding the Fourth Proportional to 20,686,623.10, 28,547,538.48 and 11,989,840.21

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Solution

The fourth proportional to 20,686,623.10, 28,547,538.48 and 11,989,840.21 is: 16,545,978.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686,623.10 : 28,547,538.48 = 11,989,840.21 : x
  2. Step 2: Convert to fraction form
    20,686,623.10/28,547,538.48 = 11,989,840.21/x
  3. Step 3: Cross multiply
    20,686,623.10x = 28,547,538.48 × 11,989,840.21
  4. Step 4: Simplify right side
    20,686,623.10x = 342,280,424,764,026.31
  5. Step 5: Solve for x
    x = 342,280,424,764,026.31/20,686,623.10
  6. Step 6: Final answer
    x = 16,545,978.68

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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.