Home / 30,530.90-42,153.20-19,063.28

Finding the Fourth Proportional to 30,530.90, 42,153.20 and 19,063.28

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Solution

The fourth proportional to 30,530.90, 42,153.20 and 19,063.28 is: 26,320.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,530.90 : 42,153.20 = 19,063.28 : x
  2. Step 2: Convert to fraction form
    30,530.90/42,153.20 = 19,063.28/x
  3. Step 3: Cross multiply
    30,530.90x = 42,153.20 × 19,063.28
  4. Step 4: Simplify right side
    30,530.90x = 803,578,091.39
  5. Step 5: Solve for x
    x = 803,578,091.39/30,530.90
  6. Step 6: Final answer
    x = 26,320.16

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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.