Home / 20,813,061.22-28,718,598.09-13,072,589.86

Finding the Fourth Proportional to 20,813,061.22, 28,718,598.09 and 13,072,589.86

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Solution

The fourth proportional to 20,813,061.22, 28,718,598.09 and 13,072,589.86 is: 18,038,021.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813,061.22 : 28,718,598.09 = 13,072,589.86 : x
  2. Step 2: Convert to fraction form
    20,813,061.22/28,718,598.09 = 13,072,589.86/x
  3. Step 3: Cross multiply
    20,813,061.22x = 28,718,598.09 × 13,072,589.86
  4. Step 4: Simplify right side
    20,813,061.22x = 375,426,454,184,749.38
  5. Step 5: Solve for x
    x = 375,426,454,184,749.38/20,813,061.22
  6. Step 6: Final answer
    x = 18,038,021.90

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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.