Home / 15,818.78-23,731.80-5,430.50

Finding the Fourth Proportional to 15,818.78, 23,731.80 and 5,430.50

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Solution

The fourth proportional to 15,818.78, 23,731.80 and 5,430.50 is: 8,147.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,818.78 : 23,731.80 = 5,430.50 : x
  2. Step 2: Convert to fraction form
    15,818.78/23,731.80 = 5,430.50/x
  3. Step 3: Cross multiply
    15,818.78x = 23,731.80 × 5,430.50
  4. Step 4: Simplify right side
    15,818.78x = 128,875,539.90
  5. Step 5: Solve for x
    x = 128,875,539.90/15,818.78
  6. Step 6: Final answer
    x = 8,147.00

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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.