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Finding the Fourth Proportional to 38,690.04, 53,044.54 and 37,990.20

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Solution

The fourth proportional to 38,690.04, 53,044.54 and 37,990.20 is: 52,085.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,690.04 : 53,044.54 = 37,990.20 : x
  2. Step 2: Convert to fraction form
    38,690.04/53,044.54 = 37,990.20/x
  3. Step 3: Cross multiply
    38,690.04x = 53,044.54 × 37,990.20
  4. Step 4: Simplify right side
    38,690.04x = 2,015,172,683.51
  5. Step 5: Solve for x
    x = 2,015,172,683.51/38,690.04
  6. Step 6: Final answer
    x = 52,085.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.