Home / 15,140.81-20,894.15-8,426.32

Finding the Fourth Proportional to 15,140.81, 20,894.15 and 8,426.32

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Solution

The fourth proportional to 15,140.81, 20,894.15 and 8,426.32 is: 11,628.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,140.81 : 20,894.15 = 8,426.32 : x
  2. Step 2: Convert to fraction form
    15,140.81/20,894.15 = 8,426.32/x
  3. Step 3: Cross multiply
    15,140.81x = 20,894.15 × 8,426.32
  4. Step 4: Simplify right side
    15,140.81x = 176,060,762.86
  5. Step 5: Solve for x
    x = 176,060,762.86/15,140.81
  6. Step 6: Final answer
    x = 11,628.23

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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.