Home / 28,281.26-42,416.40-8,555.20

Finding the Fourth Proportional to 28,281.26, 42,416.40 and 8,555.20

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Solution

The fourth proportional to 28,281.26, 42,416.40 and 8,555.20 is: 12,831.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,281.26 : 42,416.40 = 8,555.20 : x
  2. Step 2: Convert to fraction form
    28,281.26/42,416.40 = 8,555.20/x
  3. Step 3: Cross multiply
    28,281.26x = 42,416.40 × 8,555.20
  4. Step 4: Simplify right side
    28,281.26x = 362,880,785.28
  5. Step 5: Solve for x
    x = 362,880,785.28/28,281.26
  6. Step 6: Final answer
    x = 12,831.14

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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.