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Finding the Fourth Proportional to 26,653.15, 39,980.75 and 6,931.20

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Solution

The fourth proportional to 26,653.15, 39,980.75 and 6,931.20 is: 10,397.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,653.15 : 39,980.75 = 6,931.20 : x
  2. Step 2: Convert to fraction form
    26,653.15/39,980.75 = 6,931.20/x
  3. Step 3: Cross multiply
    26,653.15x = 39,980.75 × 6,931.20
  4. Step 4: Simplify right side
    26,653.15x = 277,114,574.40
  5. Step 5: Solve for x
    x = 277,114,574.40/26,653.15
  6. Step 6: Final answer
    x = 10,397.07

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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.