Home / 30,457.04-42,032.32-18,518.40

Finding the Fourth Proportional to 30,457.04, 42,032.32 and 18,518.40

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Solution

The fourth proportional to 30,457.04, 42,032.32 and 18,518.40 is: 25,556.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,457.04 : 42,032.32 = 18,518.40 : x
  2. Step 2: Convert to fraction form
    30,457.04/42,032.32 = 18,518.40/x
  3. Step 3: Cross multiply
    30,457.04x = 42,032.32 × 18,518.40
  4. Step 4: Simplify right side
    30,457.04x = 778,371,314.69
  5. Step 5: Solve for x
    x = 778,371,314.69/30,457.04
  6. Step 6: Final answer
    x = 25,556.37

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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.