Home / 30,456.64-42,025.28-18,513.60

Finding the Fourth Proportional to 30,456.64, 42,025.28 and 18,513.60

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Solution

The fourth proportional to 30,456.64, 42,025.28 and 18,513.60 is: 25,545.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,456.64 : 42,025.28 = 18,513.60 : x
  2. Step 2: Convert to fraction form
    30,456.64/42,025.28 = 18,513.60/x
  3. Step 3: Cross multiply
    30,456.64x = 42,025.28 × 18,513.60
  4. Step 4: Simplify right side
    30,456.64x = 778,039,223.81
  5. Step 5: Solve for x
    x = 778,039,223.81/30,456.64
  6. Step 6: Final answer
    x = 25,545.80

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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.