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Finding the Fourth Proportional to 28,663.70, 42,981.15 and 13,063.70

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Solution

The fourth proportional to 28,663.70, 42,981.15 and 13,063.70 is: 19,588.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,663.70 : 42,981.15 = 13,063.70 : x
  2. Step 2: Convert to fraction form
    28,663.70/42,981.15 = 13,063.70/x
  3. Step 3: Cross multiply
    28,663.70x = 42,981.15 × 13,063.70
  4. Step 4: Simplify right side
    28,663.70x = 561,492,849.26
  5. Step 5: Solve for x
    x = 561,492,849.26/28,663.70
  6. Step 6: Final answer
    x = 19,588.99

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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.