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Finding the Fourth Proportional to 28,572.66, 42,858.99 and 12,994.74

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Solution

The fourth proportional to 28,572.66, 42,858.99 and 12,994.74 is: 19,492.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,572.66 : 42,858.99 = 12,994.74 : x
  2. Step 2: Convert to fraction form
    28,572.66/42,858.99 = 12,994.74/x
  3. Step 3: Cross multiply
    28,572.66x = 42,858.99 × 12,994.74
  4. Step 4: Simplify right side
    28,572.66x = 556,941,431.71
  5. Step 5: Solve for x
    x = 556,941,431.71/28,572.66
  6. Step 6: Final answer
    x = 19,492.11

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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.