Home / 39,875.81-55,027.32-21,970.76

Finding the Fourth Proportional to 39,875.81, 55,027.32 and 21,970.76

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Solution

The fourth proportional to 39,875.81, 55,027.32 and 21,970.76 is: 30,318.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,875.81 : 55,027.32 = 21,970.76 : x
  2. Step 2: Convert to fraction form
    39,875.81/55,027.32 = 21,970.76/x
  3. Step 3: Cross multiply
    39,875.81x = 55,027.32 × 21,970.76
  4. Step 4: Simplify right side
    39,875.81x = 1,208,992,041.16
  5. Step 5: Solve for x
    x = 1,208,992,041.16/39,875.81
  6. Step 6: Final answer
    x = 30,318.93

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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.