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Finding the Fourth Proportional to 18,901.52, 26,085.12 and 10,518.20

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Solution

The fourth proportional to 18,901.52, 26,085.12 and 10,518.20 is: 14,515.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,901.52 : 26,085.12 = 10,518.20 : x
  2. Step 2: Convert to fraction form
    18,901.52/26,085.12 = 10,518.20/x
  3. Step 3: Cross multiply
    18,901.52x = 26,085.12 × 10,518.20
  4. Step 4: Simplify right side
    18,901.52x = 274,368,509.18
  5. Step 5: Solve for x
    x = 274,368,509.18/18,901.52
  6. Step 6: Final answer
    x = 14,515.68

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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.