Home / 30,331,887.40-45,497,831.10-20,128,220.20

Finding the Fourth Proportional to 30,331,887.40, 45,497,831.10 and 20,128,220.20

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Solution

The fourth proportional to 30,331,887.40, 45,497,831.10 and 20,128,220.20 is: 30,192,330.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,331,887.40 : 45,497,831.10 = 20,128,220.20 : x
  2. Step 2: Convert to fraction form
    30,331,887.40/45,497,831.10 = 20,128,220.20/x
  3. Step 3: Cross multiply
    30,331,887.40x = 45,497,831.10 × 20,128,220.20
  4. Step 4: Simplify right side
    30,331,887.40x = 915,790,363,003,208.25
  5. Step 5: Solve for x
    x = 915,790,363,003,208.25/30,331,887.40
  6. Step 6: Final answer
    x = 30,192,330.30

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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.