Home / 30,585,821.84-42,186,944.90-20,128,506.38

Finding the Fourth Proportional to 30,585,821.84, 42,186,944.90 and 20,128,506.38

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Solution

The fourth proportional to 30,585,821.84, 42,186,944.90 and 20,128,506.38 is: 27,763,196.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,585,821.84 : 42,186,944.90 = 20,128,506.38 : x
  2. Step 2: Convert to fraction form
    30,585,821.84/42,186,944.90 = 20,128,506.38/x
  3. Step 3: Cross multiply
    30,585,821.84x = 42,186,944.90 × 20,128,506.38
  4. Step 4: Simplify right side
    30,585,821.84x = 849,160,189,572,358.38
  5. Step 5: Solve for x
    x = 849,160,189,572,358.38/30,585,821.84
  6. Step 6: Final answer
    x = 27,763,196.75

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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.