Home / 40,688.20-61,032.30-28,878.40

Finding the Fourth Proportional to 40,688.20, 61,032.30 and 28,878.40

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Solution

The fourth proportional to 40,688.20, 61,032.30 and 28,878.40 is: 43,317.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,688.20 : 61,032.30 = 28,878.40 : x
  2. Step 2: Convert to fraction form
    40,688.20/61,032.30 = 28,878.40/x
  3. Step 3: Cross multiply
    40,688.20x = 61,032.30 × 28,878.40
  4. Step 4: Simplify right side
    40,688.20x = 1,762,515,172.32
  5. Step 5: Solve for x
    x = 1,762,515,172.32/40,688.20
  6. Step 6: Final answer
    x = 43,317.60

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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.