Finding the Fourth Proportional to 20,779,891.20, 28,657,681.92 and 13,045,654.08
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Solution
The fourth proportional to 20,779,891.20, 28,657,681.92 and 13,045,654.08 is: 17,991,345.65
Step by Step Solution
- Step 1: Write the proportion equation
20,779,891.20 : 28,657,681.92 = 13,045,654.08 : x - Step 2: Convert to fraction form
20,779,891.20/28,657,681.92 = 13,045,654.08/x - Step 3: Cross multiply
20,779,891.20x = 28,657,681.92 × 13,045,654.08 - Step 4: Simplify right side
20,779,891.20x = 373,858,205,062,990.25 - Step 5: Solve for x
x = 373,858,205,062,990.25/20,779,891.20 - Step 6: Final answer
x = 17,991,345.65
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.