Home / 30,545.64-42,152.40-19,915.20

Finding the Fourth Proportional to 30,545.64, 42,152.40 and 19,915.20

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Solution

The fourth proportional to 30,545.64, 42,152.40 and 19,915.20 is: 27,482.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,545.64 : 42,152.40 = 19,915.20 : x
  2. Step 2: Convert to fraction form
    30,545.64/42,152.40 = 19,915.20/x
  3. Step 3: Cross multiply
    30,545.64x = 42,152.40 × 19,915.20
  4. Step 4: Simplify right side
    30,545.64x = 839,473,476.48
  5. Step 5: Solve for x
    x = 839,473,476.48/30,545.64
  6. Step 6: Final answer
    x = 27,482.60

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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.