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Finding the Fourth Proportional to 28,362.10, 42,543.15 and 12,810.10

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Solution

The fourth proportional to 28,362.10, 42,543.15 and 12,810.10 is: 19,215.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,362.10 : 42,543.15 = 12,810.10 : x
  2. Step 2: Convert to fraction form
    28,362.10/42,543.15 = 12,810.10/x
  3. Step 3: Cross multiply
    28,362.10x = 42,543.15 × 12,810.10
  4. Step 4: Simplify right side
    28,362.10x = 544,982,005.82
  5. Step 5: Solve for x
    x = 544,982,005.82/28,362.10
  6. Step 6: Final answer
    x = 19,215.15

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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.