Home / 30,970.59-42,715.86-21,426.36

Finding the Fourth Proportional to 30,970.59, 42,715.86 and 21,426.36

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Solution

The fourth proportional to 30,970.59, 42,715.86 and 21,426.36 is: 29,552.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,970.59 : 42,715.86 = 21,426.36 : x
  2. Step 2: Convert to fraction form
    30,970.59/42,715.86 = 21,426.36/x
  3. Step 3: Cross multiply
    30,970.59x = 42,715.86 × 21,426.36
  4. Step 4: Simplify right side
    30,970.59x = 915,245,394.07
  5. Step 5: Solve for x
    x = 915,245,394.07/30,970.59
  6. Step 6: Final answer
    x = 29,552.08

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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.