Home / 39,303.04-54,238.32-21,398.20

Finding the Fourth Proportional to 39,303.04, 54,238.32 and 21,398.20

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Solution

The fourth proportional to 39,303.04, 54,238.32 and 21,398.20 is: 29,529.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,303.04 : 54,238.32 = 21,398.20 : x
  2. Step 2: Convert to fraction form
    39,303.04/54,238.32 = 21,398.20/x
  3. Step 3: Cross multiply
    39,303.04x = 54,238.32 × 21,398.20
  4. Step 4: Simplify right side
    39,303.04x = 1,160,602,419.02
  5. Step 5: Solve for x
    x = 1,160,602,419.02/39,303.04
  6. Step 6: Final answer
    x = 29,529.58

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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.