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Finding the Fourth Proportional to 18,990.79, 26,206.74 and 10,492.74

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Solution

The fourth proportional to 18,990.79, 26,206.74 and 10,492.74 is: 14,479.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,990.79 : 26,206.74 = 10,492.74 : x
  2. Step 2: Convert to fraction form
    18,990.79/26,206.74 = 10,492.74/x
  3. Step 3: Cross multiply
    18,990.79x = 26,206.74 × 10,492.74
  4. Step 4: Simplify right side
    18,990.79x = 274,980,509.07
  5. Step 5: Solve for x
    x = 274,980,509.07/18,990.79
  6. Step 6: Final answer
    x = 14,479.68

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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.