Home / 30,915.18-42,659.07-18,337.50

Finding the Fourth Proportional to 30,915.18, 42,659.07 and 18,337.50

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Solution

The fourth proportional to 30,915.18, 42,659.07 and 18,337.50 is: 25,303.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,915.18 : 42,659.07 = 18,337.50 : x
  2. Step 2: Convert to fraction form
    30,915.18/42,659.07 = 18,337.50/x
  3. Step 3: Cross multiply
    30,915.18x = 42,659.07 × 18,337.50
  4. Step 4: Simplify right side
    30,915.18x = 782,260,696.13
  5. Step 5: Solve for x
    x = 782,260,696.13/30,915.18
  6. Step 6: Final answer
    x = 25,303.45

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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.