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Finding the Fourth Proportional to 18,803.60, 28,225.92 and 13,857.92

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Solution

The fourth proportional to 18,803.60, 28,225.92 and 13,857.92 is: 20,802.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,803.60 : 28,225.92 = 13,857.92 : x
  2. Step 2: Convert to fraction form
    18,803.60/28,225.92 = 13,857.92/x
  3. Step 3: Cross multiply
    18,803.60x = 28,225.92 × 13,857.92
  4. Step 4: Simplify right side
    18,803.60x = 391,152,541.29
  5. Step 5: Solve for x
    x = 391,152,541.29/18,803.60
  6. Step 6: Final answer
    x = 20,802.00

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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.