Home / 30,968.40-42,746.46-18,220.86

Finding the Fourth Proportional to 30,968.40, 42,746.46 and 18,220.86

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Solution

The fourth proportional to 30,968.40, 42,746.46 and 18,220.86 is: 25,150.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,968.40 : 42,746.46 = 18,220.86 : x
  2. Step 2: Convert to fraction form
    30,968.40/42,746.46 = 18,220.86/x
  3. Step 3: Cross multiply
    30,968.40x = 42,746.46 × 18,220.86
  4. Step 4: Simplify right side
    30,968.40x = 778,877,263.16
  5. Step 5: Solve for x
    x = 778,877,263.16/30,968.40
  6. Step 6: Final answer
    x = 25,150.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.