Home / 30,829.12-42,547.08-18,255.76

Finding the Fourth Proportional to 30,829.12, 42,547.08 and 18,255.76

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Solution

The fourth proportional to 30,829.12, 42,547.08 and 18,255.76 is: 25,194.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,829.12 : 42,547.08 = 18,255.76 : x
  2. Step 2: Convert to fraction form
    30,829.12/42,547.08 = 18,255.76/x
  3. Step 3: Cross multiply
    30,829.12x = 42,547.08 × 18,255.76
  4. Step 4: Simplify right side
    30,829.12x = 776,729,281.18
  5. Step 5: Solve for x
    x = 776,729,281.18/30,829.12
  6. Step 6: Final answer
    x = 25,194.66

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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.