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Finding the Fourth Proportional to 14,798.95, 20,420.70 and 8,426.38

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Solution

The fourth proportional to 14,798.95, 20,420.70 and 8,426.38 is: 11,627.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,798.95 : 20,420.70 = 8,426.38 : x
  2. Step 2: Convert to fraction form
    14,798.95/20,420.70 = 8,426.38/x
  3. Step 3: Cross multiply
    14,798.95x = 20,420.70 × 8,426.38
  4. Step 4: Simplify right side
    14,798.95x = 172,072,578.07
  5. Step 5: Solve for x
    x = 172,072,578.07/14,798.95
  6. Step 6: Final answer
    x = 11,627.35

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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.