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Finding the Fourth Proportional to 28,609.60, 42,927.20 and 13,019.20

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Solution

The fourth proportional to 28,609.60, 42,927.20 and 13,019.20 is: 19,534.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,609.60 : 42,927.20 = 13,019.20 : x
  2. Step 2: Convert to fraction form
    28,609.60/42,927.20 = 13,019.20/x
  3. Step 3: Cross multiply
    28,609.60x = 42,927.20 × 13,019.20
  4. Step 4: Simplify right side
    28,609.60x = 558,877,802.24
  5. Step 5: Solve for x
    x = 558,877,802.24/28,609.60
  6. Step 6: Final answer
    x = 19,534.62

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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.