Home / 30,865.04-42,564.50-21,289.62

Finding the Fourth Proportional to 30,865.04, 42,564.50 and 21,289.62

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Solution

The fourth proportional to 30,865.04, 42,564.50 and 21,289.62 is: 29,359.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,865.04 : 42,564.50 = 21,289.62 : x
  2. Step 2: Convert to fraction form
    30,865.04/42,564.50 = 21,289.62/x
  3. Step 3: Cross multiply
    30,865.04x = 42,564.50 × 21,289.62
  4. Step 4: Simplify right side
    30,865.04x = 906,182,030.49
  5. Step 5: Solve for x
    x = 906,182,030.49/30,865.04
  6. Step 6: Final answer
    x = 29,359.50

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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.