Home / 21,784.04-30,070.02-13,831.40

Finding the Fourth Proportional to 21,784.04, 30,070.02 and 13,831.40

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Solution

The fourth proportional to 21,784.04, 30,070.02 and 13,831.40 is: 19,092.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,784.04 : 30,070.02 = 13,831.40 : x
  2. Step 2: Convert to fraction form
    21,784.04/30,070.02 = 13,831.40/x
  3. Step 3: Cross multiply
    21,784.04x = 30,070.02 × 13,831.40
  4. Step 4: Simplify right side
    21,784.04x = 415,910,474.63
  5. Step 5: Solve for x
    x = 415,910,474.63/21,784.04
  6. Step 6: Final answer
    x = 19,092.44

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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.