Home / 30,478.04-42,058.38-19,159.16

Finding the Fourth Proportional to 30,478.04, 42,058.38 and 19,159.16

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Solution

The fourth proportional to 30,478.04, 42,058.38 and 19,159.16 is: 26,438.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,478.04 : 42,058.38 = 19,159.16 : x
  2. Step 2: Convert to fraction form
    30,478.04/42,058.38 = 19,159.16/x
  3. Step 3: Cross multiply
    30,478.04x = 42,058.38 × 19,159.16
  4. Step 4: Simplify right side
    30,478.04x = 805,803,231.76
  5. Step 5: Solve for x
    x = 805,803,231.76/30,478.04
  6. Step 6: Final answer
    x = 26,438.81

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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.