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Finding the Fourth Proportional to 28,573.60, 42,884.70 and 12,802.90

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Solution

The fourth proportional to 28,573.60, 42,884.70 and 12,802.90 is: 19,215.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,573.60 : 42,884.70 = 12,802.90 : x
  2. Step 2: Convert to fraction form
    28,573.60/42,884.70 = 12,802.90/x
  3. Step 3: Cross multiply
    28,573.60x = 42,884.70 × 12,802.90
  4. Step 4: Simplify right side
    28,573.60x = 549,048,525.63
  5. Step 5: Solve for x
    x = 549,048,525.63/28,573.60
  6. Step 6: Final answer
    x = 19,215.24

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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.