Home / 18,720,939.10-28,081,408.65-9,142,462.30

Finding the Fourth Proportional to 18,720,939.10, 28,081,408.65 and 9,142,462.30

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Solution

The fourth proportional to 18,720,939.10, 28,081,408.65 and 9,142,462.30 is: 13,713,693.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720,939.10 : 28,081,408.65 = 9,142,462.30 : x
  2. Step 2: Convert to fraction form
    18,720,939.10/28,081,408.65 = 9,142,462.30/x
  3. Step 3: Cross multiply
    18,720,939.10x = 28,081,408.65 × 9,142,462.30
  4. Step 4: Simplify right side
    18,720,939.10x = 256,733,219,913,518.91
  5. Step 5: Solve for x
    x = 256,733,219,913,518.91/18,720,939.10
  6. Step 6: Final answer
    x = 13,713,693.45

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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.