Finding the Fourth Proportional to 39,279.99, 54,206.28 and 21,374.99
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Solution
The fourth proportional to 39,279.99, 54,206.28 and 21,374.99 is: 29,497.43
Step by Step Solution
- Step 1: Write the proportion equation
39,279.99 : 54,206.28 = 21,374.99 : x - Step 2: Convert to fraction form
39,279.99/54,206.28 = 21,374.99/x - Step 3: Cross multiply
39,279.99x = 54,206.28 × 21,374.99 - Step 4: Simplify right side
39,279.99x = 1,158,658,421.91 - Step 5: Solve for x
x = 1,158,658,421.91/39,279.99 - Step 6: Final answer
x = 29,497.43
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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.