Home / 39,875.04-55,028.52-21,970.80

Finding the Fourth Proportional to 39,875.04, 55,028.52 and 21,970.80

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Solution

The fourth proportional to 39,875.04, 55,028.52 and 21,970.80 is: 30,320.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,875.04 : 55,028.52 = 21,970.80 : x
  2. Step 2: Convert to fraction form
    39,875.04/55,028.52 = 21,970.80/x
  3. Step 3: Cross multiply
    39,875.04x = 55,028.52 × 21,970.80
  4. Step 4: Simplify right side
    39,875.04x = 1,209,020,607.22
  5. Step 5: Solve for x
    x = 1,209,020,607.22/39,875.04
  6. Step 6: Final answer
    x = 30,320.24

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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.