Home / 42,830.70-64,209.09-20,613.51

Finding the Fourth Proportional to 42,830.70, 64,209.09 and 20,613.51

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Solution

The fourth proportional to 42,830.70, 64,209.09 and 20,613.51 is: 30,902.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,830.70 : 64,209.09 = 20,613.51 : x
  2. Step 2: Convert to fraction form
    42,830.70/64,209.09 = 20,613.51/x
  3. Step 3: Cross multiply
    42,830.70x = 64,209.09 × 20,613.51
  4. Step 4: Simplify right side
    42,830.70x = 1,323,574,718.81
  5. Step 5: Solve for x
    x = 1,323,574,718.81/42,830.70
  6. Step 6: Final answer
    x = 30,902.48

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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.