Home / 15,458.04-21,332.16-8,385.12

Finding the Fourth Proportional to 15,458.04, 21,332.16 and 8,385.12

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Solution

The fourth proportional to 15,458.04, 21,332.16 and 8,385.12 is: 11,571.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,458.04 : 21,332.16 = 8,385.12 : x
  2. Step 2: Convert to fraction form
    15,458.04/21,332.16 = 8,385.12/x
  3. Step 3: Cross multiply
    15,458.04x = 21,332.16 × 8,385.12
  4. Step 4: Simplify right side
    15,458.04x = 178,872,721.46
  5. Step 5: Solve for x
    x = 178,872,721.46/15,458.04
  6. Step 6: Final answer
    x = 11,571.50

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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.